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Communications technology

Electronic communication is ubiquitous in homes, offices and urban environments. You probably regularly use mobile devices, Wi-Fi and broadband. What makes such forms of communication possible? How do they relate to each other? Why is their performance so variable? This module gives you an insight into these and other questions, by looking at the fundamental principles of communications technologies. Through these principles you will gain an insight into the possibilities and constraints of modern communications technology. This module complements other modules relating to networking, human-computer interaction, and pervasive computing.

Modules count towards OU qualifications

OU qualifications are modular in structure; the credits from this undergraduate module could count towards a certificate of higher education, diploma of higher education, foundation degree or honours degree.

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Module

Module code
TM355
Credits

Credits

  • Credits measure the student workload required for the successful completion of a module or qualification.
  • One credit represents about 10 hours of study over the duration of the course.
  • You are awarded credits after you have successfully completed a module.
  • For example, if you study a 60-credit module and successfully pass it, you will be awarded 60 credits.
30
Study level

Across the UK, there are two parallel frameworks for higher education qualifications, the Framework for Higher Education Qualifications in England, Northern Ireland and Wales (FHEQ) and the Scottish Credit and Qualifications Framework (SCQF). These define a hierarchy of levels and describe the achievement expected at each level. The information provided shows how OU module levels correspond to these frameworks.

OU SCQF FHEQ
3 10 6
Study method
Distance Learning
Module cost
See Module registration
Entry requirements
See Am I ready?

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What you will study

Block 1

Block 1 concerns the physical aspects of signals and their environment. You will study the theory and practice of signals (such as how electrical and radio signals can represent data), the propagation of signals through space and through materials, and the physical media that are used to convey signals, such as optical fibres, free space and conducting materials. Issues of noise and spectrum availability are ever-present because they set limits on what is possible. Accordingly you will study and use Shannon’s theorem, which specifies the maximum rate at which information can be sent over a channel of a specified bandwidth in the presence of noise. You will also study some concepts from Fourier’s theorem, which shows how an information-bearing signal occupies a band of frequencies rather than a single frequency.

Block 2

The second block concerns the nature and types of codes that are used to represent digital data. Although digital data is thought of as a succession zeros and ones, the way those zeros and ones represent data needs ingenuity because perfect transmission in the presence of electrical noise (or interference) is impossible; and noise is unavoidable. In practice, the probability of error must be made sufficiently low, and this is achieved by use of error detecting and error correcting codes, which add extra zeros and ones to the data. You will study some of the main coding methods used to add resilience to signals. You will also look at some of the techniques used to reduce the amount of data imperceptibly so that files can be compressed.

Block 3

The final block looks at the principal types of access network in use. These are the networks used to connect users to the main data and telephony trunk routes. They include mobile data (3G and 4G), DSL broadband (which is the type delivered over a user’s fixed-line telephone connection), Wi-Fi, optical fibre and co-axial cable. The basic principles of these are covered with a view to uncovering their similarities (such as the increasing adoption of orthogonal frequency division techniques) and the factors that affect the performance of these types of network. The block concludes by looking at the implementation of security and virtual private networks in the context of teleworking.

If you are considering progressing to The computing and IT project (TM470), this is one of the OU level 3 modules on which you could base your project topic. Normally, you should have completed one of these OU level 3 modules (or be currently studying one) before registering for the project module.

Teaching and assessment

Support from your tutor

You will have a tutor who will help you with the study material, who will mark and comment on your written work, and whom you can ask for advice and guidance. We may also be able to offer group tutorials that you are encouraged, but not obliged, to attend. Where your tutorials are held will depend on the distribution of students taking the module. There will also be online tutorials and other collaborative activities (such as student forums), which will take place in the online forum for your tutor group. Throughout the module you can use this forum to keep in touch with your tutor and fellow students.

Contact us if you want to know more about study with The Open University before you register.

Assessment

The assessment details for this module can be found in the facts box above.

You must use the online eTMA system to submit your tutor-marked assignments (TMAs).

Future availability

Communications technology (TM355) starts once a year – in October. This page describes the module that will start in October 2018. We expect it to start for the last time in October 2022.

Regulations

As a student of The Open University, you should be aware of the content of the academic regulations which are available on our Essential Documents website.

    Course work includes:

    3 Tutor-marked assignments (TMAs)
    Examination
    No residential school

    Course satisfaction survey

    See the satisfaction survey results for this course.


    Entry requirements

    This is an OU level 3 module. OU level 3 modules build on study skills and subject knowledge acquired from previous studies at levels 1 and 2. They are only intended for students with recent experience of higher education in a related subject.

    Normally, to study this module you should have studied least one of the OU level 1 modules, Discovering mathematics (MU123) or Essential mathematics 1 (MST124) (or their predecessors). You should be able to understand the distinction between analogue and digital, and be familiar with:

    • the use of binary numbers to represent digital data
    • sines and cosines.

    You will also be required to understand and perform basic manipulation of algebraic terms and to read graphs with linear and logarithmic scales.

    Prior study of Communication and information technologies (T215) is recommended as preparation for this OU level 3 module.

    If you have any doubt about the suitability of the module, please speak to an adviser.

    Register

    Start End England fee Register
    06 Oct 2018 Jun 2019 £1464.00

    Registration closes 13/09/18 (places subject to availability)

    Register
    This module is expected to start for the last time in October 2022.

    Additional Costs

    Study costs

    There may be extra costs on top of the tuition fee, such as a laptop, travel to tutorials, set books and internet access.

    If you're on a low income you might be eligible for help with some of these costs after your module has started.

    Ways to pay for this module

    Open University Student Budget Account

    The Open University Student Budget Accounts Ltd (OUSBA) offers a convenient 'pay as you go' option to pay your OU fees, which is a secure, quick and easy way to pay. Please note that The Open University works exclusively with OUSBA and is not able to offer you credit facilities from any other provider. All credit is subject to status and proof that you can afford the repayments.

    You pay the OU through OUSBA in one of the following ways:

    • Register now, pay later – OUSBA pays your module fee direct to the OU. You then repay OUSBA interest-free and in full just before your module starts. 0% APR representative. This option could give you the extra time you may need to secure the funding to repay OUSBA.
    • Pay by instalments – OUSBA calculates your monthly fee and number of instalments based on the cost of the module you are studying. APR 5.1% representative.

    Joint loan applications

    If you feel you would be unable to obtain an OUSBA loan on your own due to credit history or affordability issues, OUSBA offers the option to apply for a joint loan application with a third party. For example, your husband, wife, partner, parent, sibling or friend. In such cases, OUSBA will be required to carry out additional affordability checks separately and/or collectively for both joint applicants who will be jointly and severally liable for loan repayments.

    As additional affordability checks are required when processing joint loan applications, unfortunately, an instant decision cannot be given. On average the processing time for a joint loan application is five working days from receipt of the required documentation.

    Read more about Open University Student Budget Accounts (OUSBA).  

    Employer sponsorship

    Studying with The Open University can boost your employability. OU courses are recognised and respected by employers for their excellence and the commitment they take to complete. They also value the skills that students learn and can apply in the workplace.

    More than one in ten OU students are sponsored by their employer, and over 30,000 employers have used the OU to develop staff so far. If the module you’ve chosen is geared towards your job or developing your career, you could approach your employer to see if they will sponsor you by paying some or all of the fees. 

    • Your employer just needs to complete a simple form to confirm how much they will be paying and we will invoice them.
    • You won’t need to get your employer to complete the form until after you’ve chosen your module.  

    Credit/debit card

    You can pay part or all of your tuition fees upfront with a debit or credit card when you register for each module. 

    We accept American Express, Maestro (UK only), Mastercard, Visa/Delta and Visa Electron. 

    Mixed payments

    We know that sometimes you may want to combine payment options. For example, you may wish to pay part of your tuition fee with a debit card and pay the remainder in instalments through an Open University Student Budget Account (OUSBA).


    For more information about combining payment options, speak to an adviser or book a call back at a time convenient to you.


    Please note: your permanent address/domicile will affect your fee status and therefore the fees you are charged and any financial support available to you. The fees and funding information provided here is valid for modules starting before 31 July 2019. Fees normally increase annually in line with inflation and the University's strategic approach to fees. 

    This information was provided on 15/07/2018.

    What's included

    Most of the teaching material is in three printed books, one book for each block of the module. In addition, the module website will have supplementary items such as a study calendar, interactive online teaching material, assignments, additional reading.

    You will need

    A calculator with standard scientific functions.

    Computing requirements

    A computing device with a browser and broadband internet access is required for this module.  Any modern browser will be suitable for most computer activities. Functionality may be limited on mobile devices.

    Any additional software will be provided, or is generally freely available. However, some activities may have more specific requirements. For this reason, you will need to be able to install and run additional software on a device that meets the requirements below.

    A desktop or laptop computer with either:

    • Windows 7 or higher
    • macOS 10.7 or higher

    The screen of the device must have a resolution of at least 1024 pixels horizontally and 768 pixels vertically.

    To participate in our online-discussion area you will need both a microphone and speakers/headphones. 

    Our Skills for OU study website has further information including computing skills for study, computer security, acquiring a computer and Microsoft software offers for students. 

    If you have a disability

    The OU strives to make all aspects of study accessible to everyone and this Accessibility Statement outlines what studying TM355 involves. You should use this information to inform your study preparations and any discussions with us about how we can meet your needs.

    To find out more about what kind of support and adjustments might be available, contact us or visit our Overcoming barriers to study if you have a disability or health condition website.