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A signal detection method and device

A signal detection and signal technology, applied in the field of communication, can solve the problem of no SFBC mode and the combined processing scheme of downlink non-orthogonal multiple access technology

Active Publication Date: 2020-08-28
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a signal detection method and device to solve the problem that there is no processing scheme for the combination of SFBC mode and downlink non-orthogonal multiple access technology in the prior art

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  • A signal detection method and device
  • A signal detection method and device
  • A signal detection method and device

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Experimental program
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no. 1 example

[0101] refer to figure 1 As shown, the signal detection method of the embodiment of the present invention includes:

[0102] Step 101, according to the signal parameter metric value of each user in all user data included in the received signal of the target user, determine one or more users to be detected and the detection order of the users to be detected for the target user.

[0103] Wherein, the signal parameter metric value includes received signal power, signal-to-interference-noise ratio (SINR) or mean square error (MSE) based on pilot measurement.

[0104] For example, the signal parameter measurement value adopts SINR, assuming that the received signal of the target user includes user data of three users, user 1, user 2, and user 3, the SINR of each user is arranged in descending order: user 3, user 3 2 and user 1, it can be determined that the users to be detected for user 3 include users 1, 2 and 3, and the detection sequence is to detect users 1, 2 and 3 in sequenc...

no. 2 example

[0169] The embodiment of the present invention further describes in detail the detection scheme based on the combination of the time-frequency resource coding domain, the power domain, and the air domain based on the PDMA technology in a specific application situation.

[0170] The embodiment of the present invention adopts MMSE-CW-SIC, wherein the linear erasure criterion is based on MMSE, and the interference erasure position is at the modulation codeword level. Assuming that the downlink antenna configuration is 2*2, when SFBC is used for transmission, the PDMA pattern matrix uses 2 time-frequency resources to transmit 3 users (user 1, 2, 3), referred to as 2RU-3UE, assuming Then the PDMA patterns assigned by users 1, 2, and 3 respectively correspond to the first column of the PDMA pattern matrix The second column and the third column The user modulation mode is QPSK (Quadrature Phase Shift Keyin, Quadrature Phase Shift Keying), which adopts Gray code Gray mapping. ...

no. 3 example

[0219] The embodiment of the present invention further describes in detail the detection scheme based on the combination of the time-frequency resource coding domain, the power domain, and the air domain based on the PDMA technology in another specific application situation.

[0220] The embodiment of the present invention adopts the same assumption as the second embodiment, and the difference is that the embodiment of the present invention adopts ZF-SL-SIC, wherein the linear deletion criterion is based on ZF, and the interference cancellation position is at the modulation symbol level. Downlink PDMA The transmission diagram combined with 2*2SFBC is as follows Figures 6A-6D shown. Downlink PDMA The received signal model combined with 2*2SFBC is as follows Figure 7 shown.

[0221] The signal detection method of the embodiment of the present invention includes:

[0222] According to the SINR of each of the three user data included in the received signal of user 3, one ...

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Abstract

The invention provides a signal detection method and device, relates to the communication field, and aims at solving the problem that in the prior art, a processing scheme for combining an SFBC mode with downlink non-orthogonal multiple access does not exist. The method comprises the steps that according to signal parameter metrics, in received signals, of all users, to-be-detected users for the target user and the detection order are determined; PDMA received signal vectors of the target user are determined according to the received signals of the target user, and PDMA-SFBC-combined equivalent channel response matrixes of all the to-be-detected users corresponding to the target user are determined according to channel responses of the target user; according to the equivalent channel response matrixes and the PDMA received signal vectors, all the to-be-detected users are sequentially subjected to interference cancellation detection according to the detection order; and according to signals obtained after detection, signal source bit information of all the to-be-detected users is obtained. Accordingly, the detection scheme based on combination of the PDMA mode and the SFBC mode is achieved, and the detection performance is improved.

Description

technical field [0001] The invention relates to the communication field, in particular to a signal detection method and device. Background technique [0002] The downlink MIMO (Multiple Input Multiple Output) technology of LTE / LTE-A (LTE: Long Term Evolution, long-term evolution; LTE-A: Long Term Evolution-Advanced, long-term evolution enhancement) is constantly evolving. The number of antennas increases, the codebook is enhanced, and multi-user support is gradually improved. At present, LTE / LTE-A downlink multi-antenna technology includes open-loop SFBC (Space-Frequency Block Code, space-frequency block code), CDD (Cyclic Delay Diversity, cyclic delay diversity), closed-loop SU-MIMO (Single User-MIMO, Single-user MIMO) and MU-MIMO (Multiple Users-MIMO, multi-user MIMO) modes such as codebook-based precoding and beamforming, among which SFBC is a typical downlink transmission mode. All downlink transmission modes including SFBC are based on the orthogonal multiple access m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/08H04L1/00
CPCH04B7/0854H04B7/0857H04B7/0862H04L1/0048H04L1/005
Inventor 任斌
Owner DATANG MOBILE COMM EQUIP CO LTD