A large-scale mimo system signal detection method
A system signal and detection method technology, applied in the transmission system, radio transmission system, communication channel monitoring, etc., can solve problems such as violation and increase the difficulty of hardware design, and achieve low bit error rate and meet the requirements
Active Publication Date: 2021-02-09
SOUTHEAST UNIV
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However, even the simplest preprocessing process is accompanied by additional calculations, which increases the difficulty of hardware design and defeats the original intention of this method
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[0032] The technical solution of the present invention will be further introduced below in combination with specific embodiments.
[0033] This specific embodiment discloses an efficient massive MIMO system signal detection method, including the following process:
[0034] S1: Construct the MMSE detection model, detection matrix A and detection vector according to the channel response matrix H of the ideal channel and the received signal y Among them, the received signal y is shown in formula (1);
[0035] y=Hσ+n (1)
[0036] In formula (1), the channel response matrix H is a B×U-dimensional complex matrix, called the flat Rayleigh fading channel matrix, B is the number of antennas at the base station in a single-cell uplink situation, σ is the transmitted signal, and the vector n is that each item obeys the mean value of 0 and the variance is σ 2 The additive white Gaussian noise of , σ 2 is the variance of Gaussian white noise added during the signal propagation in spac...
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The invention discloses an efficient massive MIMO system signal detection method, which includes the following process: S1: Construct an MMSE detection model, a detection matrix A and a detection vector S2 according to the channel response matrix H of the ideal channel and the received signal y. The SDBB algorithm designed by combining the steep descent algorithm and the BB algorithm detects the received signal matrix output by the matched filter at the receiving end to obtain the estimated value of the transmitted signal. The present invention comprehensively considers the contradictory relationship between high performance and low complexity. Compared with the existing iterative detection method, the present invention is suitable for continuously expanding system scale, and can still maintain a low bit error rate under low signal-to-noise ratio under harsh conditions (when the number of user terminals is large), and is more suitable for the next generation of mobile communication Requirements for detection technology.
Description
technical field [0001] The invention relates to wireless communication technology, in particular to an efficient massive MIMO system signal detection method. Background technique [0002] Massive Multiple-Input Multiple-Output (MIMO) has become a key technology in the next generation of mobile communications and is currently a hot topic in the field of mobile communications [1] . With the fourth generation communication system technology (4G-LTE) [2-3] Unlike small-scale MIMO, which only allows the base station to be equipped with a maximum of 8 antennas, the massive MIMO system is characterized by hundreds of antennas at both the base station and user terminals. Such massive antenna arrays contribute to higher spectral efficiency, less transmit power, faster data rates and more stable link connections [4] . Therefore, massive MIMO systems are considered as one of the infrastructures for future wireless communications. [0003] Although massive MIMO systems increase the...
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IPC IPC(8): H04B7/0413H04B17/30
CPCH04B7/0413H04B17/30
Inventor 张川金洁珺尤肖虎
Owner SOUTHEAST UNIV