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Efficient multi-user multielement parallel transmission method and device

A multi-user, multi-diversified technology, applied in transmission systems, digital transmission systems, radio transmission systems, etc., can solve problems such as unsatisfactory BICM performance and high coding complexity of LDPC codes

Inactive Publication Date: 2009-08-26
CHONGQING WIRELESS OASIS COMM TECHCO
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Problems solved by technology

But the coding complexity of LDPC code is high, and the performance of LDPC code with fast coding structure is not better than Turbo
And, more importantly, the excellent performance of these two codes approaching the Shannon limit can only be obtained when the code block is long. In the case of short code blocks and medium and high code rates, the BICM performance combined with Turbo codes or LDPC codes does not make the people are satisfied

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  • Efficient multi-user multielement parallel transmission method and device
  • Efficient multi-user multielement parallel transmission method and device
  • Efficient multi-user multielement parallel transmission method and device

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Embodiment Construction

[0067] MIMO+OFDM (A) technology is playing an increasingly important role in the next-generation wireless communication system, and the basic principle, mathematical description and specific implementation of the present invention will be described in detail below in conjunction with the 3GPP LTE system based on MIMO+OFDMA technology,

[0068] Figure 1 gives Out of the QCM sending frame.

[0069] There are m users sending data at the same time, and each user corresponds to 1 channel of data. For the i-th road data, use GF(q i ) multivariate encoding, q i = 2 p i , 1≤i≤m, the coded q i The p corresponding to the meta-symbol i The bits are divided and mapped to get k i layer bitstream, layer j contains p ij bit, 1≤j≤k i , Σ j = 1 k ...

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Abstract

The invention discloses a multi-user multielement parallel transmission method and device. The device includes: corresponding one-way data in the m-way user data symbol is in the GF multielement coding to obtain m-way multielement symbol, a plurality of bits corresponding to each-way multielement symbol in the m-way multielement symbol are in the split mapping to obtain multilayer bit flow, further to obtain m multilayer bit flows, each multilayer bit flow in m multilayer bit flows is respectively modulated and mapped to corresponding constellation point to obtain L modulation symbols for m users. The L symbols are in the precoding with the dimensionality of NtXL to output Nt symbols to Nt corresponding emission antenna ports.

Description

technical field [0001] The present invention relates to a multivariate parallel transmission technology in a wireless communication system, in particular to a multivariate coding modulation transmission technology combined with a multivariate code based on a factor graph; Multi-code parallel transmission method and device. Background technique [0002] Under the condition of limited bandwidth and power, improving the transmission efficiency and reliability of the system is one of the most important problems to be solved in the new generation wireless communication system. [0003] Coded Modulation (Coded Modulation) technology has been a hot research field since ungerboeck proposed TCM in 1982. Since the joint channel coding and modulation is used to obtain the required coding gain without widening the frequency band, the joint design of TCM and coded modulation has always been a communication technology. In particular, it is an important research direction in wireless comm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/02H03M13/05
CPCH04B7/0417H04L1/0625H04L1/0057
Inventor 马馨睿段世平肖业平
Owner CHONGQING WIRELESS OASIS COMM TECHCO