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Trellis-Coded-Modulation (TCM) decoder applied in receiver and decoding method

A technology of modulation decoding and receiver, which is applied in other decoding technologies, error correction/detection using trellis coding, error correction/detection using interleaving technology, etc., and can solve the problem of long tracing length of TCM decoder and serious signal delay, etc. question

Active Publication Date: 2021-10-12
FARADAY TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, since the quality of the signal received by the receiver is not constant, in order to ensure the smooth operation of the TCM decoder, the traceback length of the TCM decoder will be set very long, thus making the signal delay more serious

Method used

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  • Trellis-Coded-Modulation (TCM) decoder applied in receiver and decoding method
  • Trellis-Coded-Modulation (TCM) decoder applied in receiver and decoding method
  • Trellis-Coded-Modulation (TCM) decoder applied in receiver and decoding method

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Embodiment Construction

[0011] figure 1 is a schematic diagram of a receiver 100 according to an embodiment of the present invention. Such as figure 1 As shown, the receiver 100 is connected to the electronic device 106 through a network connector 102 and a network cable 104, wherein the network connector 102 may be a network connector conforming to the 8P8C (8position 8contact) specification, such as an RJ45 connector (RJ45 connector), and the receiver The 100 series can be used to receive / process Gigabit Ethernet signals. In addition, the receiver 100 can be installed in any electronic device with network function, and includes a front-end circuit 110 , an analog-to-digital converter 120 , an equalizer 130 and a TCM decoder 140 using a Viterbi algorithm.

[0012] In the operation of the receiver 100, the front-end circuit 110 processes the network signal from the network connector 102 and transmits it to the analog-to-digital converter 120 to perform an analog-to-digital conversion operation to g...

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Abstract

The present invention discloses a Trellis-Coded-Modulation (TCM) decoder applied in a receiver, wherein the TCM decoder includes a branch metric unit, a path metric unit, a trace-back length selection circuit and a survival path management circuit. In operations of the TCM decoder, the branch metric unit is configured to receive multiple input codes to generate multiple sets of branch information. The path metric unit is configured to calculate multiple survival paths according to the multiple sets of branch information. The trace-back length selection circuit is configured to select a trace-back length, wherein the trace-back length is determined according to a signal quality of the receiver. The survival path management circuit is configured to return the multiple survival paths for the trace-back length in order to generate an output code.

Description

technical field [0001] The present invention relates to a Trellis-Coded-Modulation (TCM) decoder. Background technique [0002] Gigabit Ethernet (1000BASE-T) receivers usually use interleaved code modulation decoders (hereinafter referred to as TCM decoders) to perform error correction decoding operations, and the current TCM decoders are designed with fixed traceability Length (trace-back length), that is, the output code generated after pushing back from the currently received input code to a fixed depth (fixed cycle length). The above traceback length / fixed depth also directly reflects the latency of the receiver, that is, a longer traceback length reflects a longer delay. In addition, since the quality of the signal received by the receiver is not constant, in order to ensure the smooth operation of the TCM decoder, the traceback length of the TCM decoder is set to be very long, thus making the signal delay more serious. Contents of the invention [0003] Therefore, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H03M13/27
CPCH04L1/0071H03M13/27H04L43/0817H04L43/50H03M13/4169H03M13/41H03M13/256H04L27/14H04L27/12H03M13/25
Inventor 石世一
Owner FARADAY TECH CORP
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