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Tansmission system, receiver for transmission system, and method for detecting symbol information block

A transmission system, information block technology, applied in transmission systems, digital transmission systems, shaping networks in transmitters/receivers, etc., can solve problems such as not good enough

Inactive Publication Date: 2004-12-29
PENDRAGON WIRELESS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this performance is not good enough for QAM modulation and PSK modulation, which have a large number of point

Method used

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  • Tansmission system, receiver for transmission system, and method for detecting symbol information block
  • Tansmission system, receiver for transmission system, and method for detecting symbol information block
  • Tansmission system, receiver for transmission system, and method for detecting symbol information block

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] exist figure 1 An example of a transmission system according to the invention is shown in . The system comprises a transmitter 1 which transmits data to a receiver 2 via a radio channel 3 which is subject to fading.

[0034] The transmitter 1 comprises channel coding means 10 for coding a binary data stream 11 generated by a data source 12 . The channel coding means 10 comprise an encoder 15 for introducing redundancy in the data 12, an allocation means 16 for allocating selected symbols in a constellation to a group of bits, and an interleaver 17 for avoiding erroneous packets during decoding. The symbols produced by the interleaver 17 are applied to a serial-to-parallel converter 18 where the symbols are combined into a block X of length M. These information blocks are sent to the orthogonal transformation means 20 . The orthogonal transformation device 20 multiplies the vector X=[X by the orthogonal matrix T 1 , X 2 ,...,X M ] t Convert information block X to ...

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PUM

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Abstract

The present invention relates to a transmission system via a channel subjected to fading. It is known that in this case an iterative block detection method is used which notably includes a multiplication step for multiplying the received information blocks via a filter matrix whose elements are written as formula 1, wherein pj*, j=1, . . . , n are the conjugate values of the coefficients pj of the channel, n is the size of the block, E(pj<2>) is the expectation value of pj<2>, and No is the variance of the Gaussian noise. The invention proposes to utilize, after phase compensation, an improved filter matrix whose elements are written as formula 2, wherein p(i) is a real magnitude as a function of the iteration i. Advantageously, the powers p(i) are chosen by applying a criterion of bit error rate minimization. Application area: mobile communication.

Description

technical field [0001] The invention relates to a transmission system comprising at least one transmitter and a receiver for transmitting block formatted data on a transmission channel which introduces distortions defined with reference to multiplication coefficients, said receiver comprising block Detection means for detecting information blocks by successive iterations, said information block detection means themselves comprising information block multiplier means for multiplying information blocks by a filter matrix predetermined to compensate for said distortion. [0002] The invention also relates to a receiver intended for use in such a system, a block detection method intended for such a receiver and a computer program for implementing the method. [0003] The invention has important utility in the field of transmission of channels subject to fading, such as Rayleigh and Rice channels. This is the case, for example, for mobile radio systems and mobile satellite transmi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/005H04B7/26H04B15/00H04L25/03
CPCH04L2025/03611H04L25/03343H04L25/03057H04B15/00
Inventor A·舒利
Owner PENDRAGON WIRELESS LLC