Orthogonal signal division multiplexing equalization method based on diagonal block strip matrix enhancement

A strip matrix, equalization method technology, applied in baseband systems, baseband system components, shaping networks in transmitters/receivers, etc. The effect of error performance, performance loss reduction, and computational cost reduction

Active Publication Date: 2020-01-14
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

However, due to the error brought by the CE-BEM channel approximation, the actual effect of this equalization process will also be affected

Method used

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  • Orthogonal signal division multiplexing equalization method based on diagonal block strip matrix enhancement
  • Orthogonal signal division multiplexing equalization method based on diagonal block strip matrix enhancement
  • Orthogonal signal division multiplexing equalization method based on diagonal block strip matrix enhancement

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Embodiment Construction

[0019] The present invention studies the OSDM channel matrix structure under the condition of time-varying multipath dual-selective fading channel, and designs a low-complexity matrix enhancement based on Diagonal-Block-Banded (DBB) matrix accordingly. Channel equalization algorithm. Finally, the performance of the proposed OSDM equalization method is evaluated by numerical simulation, and its effectiveness in time-varying channels is verified.

[0020] The OFDM wireless communication equalization method based on DBB matrix enhancement provided by the present invention comprises the following steps: (1) adopting a time-varying channel OSDM system model, and obtaining received signals through research on composite channel matrix; (2) based on The band-limited Doppler extension completes the DBB approximation of the composite channel matrix in the received signal; (3) based on the time-domain receiving window function, the DBB approximate structure in the received signal is enha...

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Abstract

The invention provides an orthogonal signal division multiplexing equalization method based on diagonal block strip matrix enhancement. The method includes: adopting a time-varying channel OSDM systemmodel to obtain a received signal; completing DBB approximation of a composite channel matrix in the received signal based on Doppler expansion of band limit; performing enhancement processing on a DBB approximate structure in the received signal based on a time domain receiving window function; and desiging a low-complexity OSDM equalization algorithm based on a DBB matrix enhancement method ina received signal. According to the method, the normalized mean square error performance of the system is improved, the error code performance of the system is improved, the performance loss caused bythe Doppler effect is effectively reduced, the performance of the communication system is remarkably improved, the calculated amount is greatly reduced, and the method has a good application prospect.

Description

technical field [0001] The invention belongs to the field of wireless communication, and in particular relates to a low-complexity equalization method of an orthogonal signal division multiplexing system in a time-varying multipath dual-selective fading channel. Background technique [0002] Orthogonal Signal-Division Multiplexing (OSDM), as an emerging generalized modulation framework, combines Orthogonal Frequency-Division Multiplexing (OFDM) with Single-Carrier Block Transmission (Single-Carrier Block Transmission, SCBT) are unified into two extreme special cases. Specifically, OSDM divides K=MN symbols into N symbol vectors of length M in a data block, and performs modulation by performing N-point discrete Fourier Transform (Inverse Discrete Fourier Transform, IDFT) element by element . Since the values ​​of M and N can be flexibly configured according to actual conditions, the OSDM modulation method has a higher degree of freedom in balancing system design requirement...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04L25/03H04L27/26
CPCH04L25/0242H04L25/03891H04L27/2697H04L2025/03528
Inventor 韩晶张群飞马胜前王玉洁
Owner NORTHWESTERN POLYTECHNICAL UNIV
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