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Method for acquiring full marks set gain based on diagonal BLAST structure

A full-point, diagonal technology, applied in the field of space-time transmit diversity, can solve problems such as increasing the complexity of system implementation

Inactive Publication Date: 2005-11-09
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
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Problems solved by technology

However, this method requires not only to eliminate the interference between each group, but also to eliminate the interference within the group when detecting at the receiving end, which undoubtedly increases the complexity of system implementation.

Method used

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Embodiment Construction

[0049] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0050] The present invention is realized through the following steps:

[0051] 1) Build a system model

[0052] Denote a MIMO system with M transmit antennas and N receive antennas as (M,N). When using the V-BLAST structure to send data, its transmission structure is as follows figure 1 shown. The transmitter first performs space-time splitting on the input symbol sequence, and divides it into T groups of length M each b t =[s 1t the s 2t Λ s Mt ] T =1, 2, Λ, T), superscript ( ) T Indicates that the matrix is ​​transposed, and then a packet is sent in parallel from M antennas in each symbol period, where s mt (m=1, Λ, M; t=1, Λ, T) represents the signal sent from the m-th transmit antenna in the t-th symbol period, so the transmit matrix of the V-BLAST structure should be expressed as

[0053] S V ...

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Abstract

This invention relates to a method for obtaining full mark collect gain based on the diagnal hierarchy empty time structure, which first of all applies a set of optimum random basic matrixes to modulate the transmit packets on space in every symbol period in the V-BLAST structure then to transmit signals in space domain along the diagonal direction in time domain. The transmission form can get full mark collect gain at the same time when not losing the spectrum usability of the V-BLAST structure to realize double optimization of spectrum usability and performance. Besides, FD-DLST structure can be tested by the continuous forced zero and offset algorithm.

Description

technical field [0001] The present invention relates to a space-time transmit diversity technology in a multi-antenna wireless communication system, in particular to a method for obtaining full diversity gain based on a diagonal layered space-time structure Background technique [0002] Space-Time Coding (STC) technology in MIMO (Multiple Input Multiple Output, MIMO) system can make full use of space resources to provide high-speed data transmission and superior system performance, so in the future wireless communication has broad application prospects. Literature (MaXiaoli, Giannakis G.B.Full-diversity full-rate complex-field space-time coding.IEEETrans.on Signal Processing, 2003, 51(11): 2917-2930.) roughly divides the existing space-time coding into two Classes are performance-oriented and rate-oriented. Orthogonal space-time block code (Alamouti S.M.A simple transmitter diversity scheme for wireless communications.IEEE J.on Select.Areas Comm., 1998,16(8):1451-1458.); (...

Claims

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Application Information

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IPC IPC(8): H04B7/04
Inventor 王磊朱世华王君
Owner XI AN JIAOTONG UNIV
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