MIMO-OFDM detection method for sub-carrier grouping

A MIMO-OFDM, carrier grouping technology, applied in error prevention/detection using return channel, shaping network in transmitter/receiver, baseband system components, etc. low-complexity effects

Inactive Publication Date: 2010-07-07
SOUTHEAST UNIV
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Problems solved by technology

[0022] Technical problem: The object of the present invention is to provide a MIMO-OFDM detection method based on subcarrier grouping, which only needs to increase the zero-crossing rate estimation module in the channel frequency domain with a very small amount of calculation, so that the total number of MIMO-OFDM detectors The amount of calculation is much lower than the existing method of subcarrier detection, which solves the problem of the huge amount of calculation of the existing detector

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  • MIMO-OFDM detection method for sub-carrier grouping
  • MIMO-OFDM detection method for sub-carrier grouping
  • MIMO-OFDM detection method for sub-carrier grouping

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Embodiment Construction

[0044] like figure 2As shown, the present invention first adopts computer off-line statistics to obtain the different frequency domain zero-crossing rate parameters of each typical frequency selective channel, thereby adopting the channel frequency domain zero-crossing rate parameter to characterize the frequency selectivity of the channel; secondly, through computer simulation, statistics The performance indicators such as block error rate or pass rate when the system uses different subcarrier grouping intervals under different typical frequency selective channel conditions, and under the premise of acceptable performance loss, such as 0.2 ~ 0.4dB, establish a channel frequency domain Zero-crossing rate / subcarrier grouping interval table; the present invention calculates the frequency-domain zero-crossing rate parameter of channel coefficient estimation in real time by processing the channel coefficient estimation given by the channel estimation module online, and uses this p...

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Abstract

The present invention discloses an MIMO-OFDM (multiple input multiple output-orthogonal frequency division multiplexing) detection method for sub-carrier grouping and a broadband wireless communication system adopting an MIMO-OFDM technique, which relate to an MIMO-OFDM detection algorithm used in the system. In the present invention, the frequency domain zero-crossing rate range and sub-carrier group interval table of a typical frequency selective channel is set by off-line optimization with a computer emulation method in the design phase of an MIMO-OFDM detector; a frequency domain zero-crossing rate is calculated in real time according to the estimated coefficient of the channel during MIMO-OFDM on-line detection, relative sub-carrier group interval is obtained by referring to the table, and MIMO balance processing is conducted according to the group interval. The present invention largely reduces the calculation amount of detection algorithm and solves the problem that the existing MIMO-OFDM detection algorithm has large calculation amount.

Description

technical field [0001] The invention is a MIMO-OFDM detection method based on subcarrier grouping. Equalizer for MIMO-OFDM technology. The invention belongs to the technical field of MIMO-OFDM detection in communication and information technology. Background technique [0002] MIMO-OFDM Technology Overview: Multiple Input Multiple Output - Orthogonal Frequency Division (MIMO-OFDM), the wireless communication industry is transitioning from the current single-antenna, single-carrier system to a multi-antenna, multi-carrier system. The multipath delay spread of the wireless channel causes the frequency selective fading of the wireless signal. In order to suppress the intersymbol interference caused by frequency selectivity, OFDM modulation technology converts a wideband frequency selective channel into multiple parallel flat fading narrowband channels, which improves the reliability of the air interface. In 1996, Foschini et al. proposed the MIMO technology, which uses multi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04L25/03H04L27/26H04L1/18
Inventor 黄鹤王焱赵春明姜明
Owner SOUTHEAST UNIV
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