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Low complexity decoding method for large-scale antenna system

A large-scale antenna and low-complexity technology, applied in the field of wireless communication, multi-cell multi-user large-scale antenna, can solve the problem of high complexity of decoding method

Inactive Publication Date: 2016-03-09
HANGZHOU DIANZI UNIV
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Problems solved by technology

[0004] Aiming at the high complexity of existing decoding methods, the present invention proposes a low-complexity decoding method for uplink multi-cell multi-user large-scale antenna systems

Method used

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  • Low complexity decoding method for large-scale antenna system

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Embodiment 1

[0032] Assume that the number of antennas is M=128, L=3 cells, each cell has K=3 users, firstly send the training sequence of τ=3, and then send T 1 = 1 information sequence. B takes a random diagonal matrix (the first element on the diagonal is 1, and the remaining elements are random numbers between 0 and 1 arranged in descending order). Follow the steps below:

[0033] 1. Design the sending and receiving signal equations

[0034] Assume that the system has 3 cells, each cell has a base station and 3 users, each base station is equipped with 128 antennas, and there is co-channel interference between the cells. Assume that the k-th user in the l-th cell first sends a training sequence of length τ=3, and then sends a training sequence of length T 1 =1 information sequence, form the input signal matrix X, and satisfy X=[X 1 x 2 x 3 ] t , X l =[x l1 x l2 x l3 ] t , where x lk (l=1, 2, 3, k=1, 2, 3) are all taken from the standard 4-QAM, and are signals sent by the k...

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Abstract

The present invention discloses a low complexity decoding method for a large-scale antenna system. The method compries the steps of (1) designing sending and receiving signals, (2) decoding an input signal matrix X: (a) obtaining an estimation channel H (shown in the patent specification) according to a sent training matrix Fai and a corresponding receiving signal Y0, (b) carrying out data decoding of the information xlk of a kth user in a first base station, and defining G (shown in the patent specification), in an MIMO system, when M is much larger than LK and M is large, defining Hl and Bl (shown in the patent specification), and carrying out approximated representation of G (shown in the patent specification), (3) decoding the data information xlk of the kth user in the given first base station (shown in the patent specification), and (4) decoding the steps (1), (2), and (3) by using the data in the step (2), and deocding the data information wlk of all users.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, in particular to the technical field of multi-cell multi-user large-scale antenna for wireless communication, and specifically refers to the application of a low-complexity decoding method in a large-scale antenna system. Background technique [0002] With the rapid development of wireless communication technology, traditional MIMO technology can no longer meet people's requirements for wireless data transmission. Therefore, a multi-user multiple-input multiple-output (MU-MIMO) wireless communication system has been widely used because it can ensure the rate and accuracy of wireless data transmission while multiple users in multiple cells communicate simultaneously. However, compared with the traditional MIMO system, the MU-MIMO wireless communication system has problems such as the randomness of channel state information and the interference of users between cells. [0003] Massi...

Claims

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Application Information

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IPC IPC(8): H04B7/04H04L1/00
CPCH04B7/0413H04L1/0023H04L1/0047
Inventor 王海泉营梦云岳晓春乔德跃
Owner HANGZHOU DIANZI UNIV
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