Manipulate Delays

In the design and analysis of communications systems, managing delays is crucial for ensuring accurate data transmission and reception. Delays disrupt the synchronization between sender and receiver, causing errors when the receiver interprets the data. To address these challenges, you must account for delays and also manipulate them to maintain data integrity.

By identifying and adjusting specific signal components directly, you can visualize, account for, and correct delays causing data misalignment without the need for a full transmitter or receiver system. The Communication Toolbox functions, objects, and blocks enable engineers to simulate the performance delays and aid in the analysis and correction of signal delays and misalignments.

For example, in scenarios where a system experiences a delay between a block encoder and its corresponding decoder, the decoder can misinterpret the start and end points of the codewords leading to inaccurate outputs. This issue arises in communications systems where block-oriented operations (interleaving, block coding, or bit-to-integer conversions) are separated by elements that introduce delays. For more information, see Causes of Processing Delay.

To avoid this problem, you can insert an appropriate amount of delay between the encoder and decoder. These examples here explain the purpose, methods, and implications of manipulating delays in a variety of circumstances:

• Correct Alignment Problems Caused by Delays in Blocked-Based Operations

• Correct Misalignment of Interleaved Words Due to Demodulation

• Correct Misalignment of Concatenated Codewords

• Correct Misalignment of Symbol Boundaries

Related Examples

• Calculate and Specify Receive Delay for Error Rate Block
• Set Receive Delay Using Find Delay Block

More About

• Delays in Communication Systems
• Causes of Processing Delay