trellis-coded modulation
Quick Summary
Trellis-coded modulation (TCM) is an advanced communication technique that combines convolutional encoding with modulation. Instead of just encoding bits, a trellis encoder generates modulation symbols. This process is integrated with modulation at the transmitter, creating a system where error correction and signal modulation happen together.
At the receiver, the decoding and demodulating processes are performed jointly. This integrated approach optimizes the performance of the error-correction algorithm. TCM is a key component in modern high-speed modems, enabling data rates of 9,600 bits per second and higher. It improves the reliability of data transmission by adding redundancy to correct errors that occur during transmission.12
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telecommunicationConvolutional encoding…producing a system known as trellis-coded modulation. At the receiver, decoding and demodulating are performed jointly in order to optimize the performance of the error-correcting algorithm.
Read More…producing a system known as trellis-coded modulation. At the receiver, decoding and demodulating are performed jointly in order to optimize the performance of the error-correcting algorithm.
Read More- telecommunicationAdvanced methods
…with QAM is known as trellis-coded modulation (TCM), which is described in Channel encoding. Trellis-coded modulation forms an essential part of most of the modern voiceband modems operating at data rates of 9,600 bits per second and above, including V.32 and V.34 modems.
Read More…with QAM is known as trellis-coded modulation (TCM), which is described in Channel encoding. Trellis-coded modulation forms an essential part of most of the modern voiceband modems operating at data rates of 9,600 bits per second and above, including V.32 and V.34 modems.
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