Transmission diversity detection method and device in a kind of OFDM system
A technology of transmission diversity and detection method, which is applied in the directions of multi-frequency code systems, space transmit diversity, baseband system components, etc., and can solve the problems of performance loss, multi-computation, and large computation.
Active Publication Date: 2017-07-14
DATANG MOBILE COMM EQUIP CO LTD
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[0028] The inventors of the present invention found that when the above-mentioned method is directly used for detection, the amount of calculation is relatively large, especially in the case of MMSE equalization, the introduction of the weighted value of the signal-to-noise ratio will bring a lot of additional calculations, and the complexity of the calculation is relatively large. Moreover, when the product is realized, a fixed-point implementation scheme is adopted, and truncation operations are required in the intermediate process. Multiple truncations are required for multiple multiplications, which will also cause performance loss. In addition, since the signal-to-noise ratio weighting is aimed at For high-order modulation, it will also increase the amount of calculation
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[0041]Embodiments of the present invention provide a transmission diversity detection method and device in an OFDM system. After receiving antenna data, the received antenna data is first equalized and signal-to-noise ratio weighted, and demodulated based on the equalized and weighted soft symbols , since the signal-to-noise ratio weighting process is performed first and then the demodulation is performed, the joint operation of equalization and signal-to-noise ratio weighting can be performed, so the calculation amount is simplified and the complexity of transmission diversity detection is reduced.
[0042] like figure 2 As shown, the transmission diversity detection method in the OFDM system provided by the embodiment of the present invention includes:
[0043] Step S201, performing equalization and signal-to-noise ratio weighting processing on the received antenna data to obtain equalized and weighted soft symbols;
[0044] Step S202, performing demodulation based on the ...
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The invention discloses a transmission diversity detection method and device in an OFDM system, which relates to communication technology. The embodiment of the invention provides a transmission diversity detection method and device in an OFDM system. After receiving antenna data, the received antenna data is first Equalization and SNR weighting processing, based on the soft symbols after equalization and weighting for demodulation, since the SNR weighting processing is performed first and then demodulated, the joint operation of equalization and SNR weighting can be performed, so the calculation is simplified The amount reduces the complexity of transmit diversity detection.
Description
technical field [0001] The invention relates to communication technology, in particular to a transmission diversity detection method and device in an OFDM system. Background technique [0002] In the product realization of the mobile communication system, the detection module is a key module of the baseband processing of the physical layer, and its calculation amount is also one of the modules with a large amount of calculation in the baseband processing. Therefore, how to reduce the detection module without losing performance as much as possible? The amount of computation plays an extremely important role in reducing the cost of the product, optimizing the timing design of the entire system, and reducing the delay of the business plane. [0003] At present, there are many types of detection algorithms, which are mainly divided into the following three categories: [0004] Linear detection algorithms, such as ZF (Zero Forcing, zero forcing), MMSE (Minimum Mean Square Error,...
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IPC IPC(8): H04L27/26H04L25/02H04B7/08
Inventor 李全琼郭保娟
Owner DATANG MOBILE COMM EQUIP CO LTD