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Polarization modulation based phase noise elimination method in massive MIMO-OFDM (Multiple Input Multiple Output-Orthogonal Frequency Division Multiplexing) uplink system

A polarization modulation and phase noise technology, which is used in transmission systems, baseband systems, multi-frequency code systems, etc.

Inactive Publication Date: 2019-02-19
WEST ANHUI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the prior art, the research on the phase noise in the massive MIMO-OFDM uplink system mainly focuses on the modeling of the influence of the phase noise and the theoretical derivation of the influence of the phase noise on the system capacity; there is no research on the massive MIMO-OFDM uplink system Research on Elimination of Phase Noise

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  • Polarization modulation based phase noise elimination method in massive MIMO-OFDM (Multiple Input Multiple Output-Orthogonal Frequency Division Multiplexing) uplink system
  • Polarization modulation based phase noise elimination method in massive MIMO-OFDM (Multiple Input Multiple Output-Orthogonal Frequency Division Multiplexing) uplink system
  • Polarization modulation based phase noise elimination method in massive MIMO-OFDM (Multiple Input Multiple Output-Orthogonal Frequency Division Multiplexing) uplink system

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Embodiment Construction

[0085] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0086] Depend on figure 1 As shown, the massive MIMO-OFDM uplink system in the present invention is a single-user massive MIMO-OFDM uplink system using polar modulation, including a user and a base station BS; Cross-frequency division multiplexing technology, that is, OFDM technology to transmit data; the massive MIMO-OFDM uplink system has N subcarriers, and the interval between subcarriers is 1 / T S ; T S is the sampling interval. The user end is equipped ...

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Abstract

The invention discloses a polarization modulation based phase noise elimination method in a massive MIMO-OFDM (Multiple Input Multiple Output-Orthogonal Frequency Division Multiplexing) uplink system,and belongs to the technical field of wireless communication. According to the invention, transmitting and receiving ends of the massive MIMO-OFDM uplink system are designed; at the transmitting end,orthogonal dual-polarization antennas are deployed and a polarization modulation signal is transmitted; and at the receiving end, a pair of orthogonal dual-polarization antennas are deployed and thepolarization modulation signal is received and demodulated. At the receiving end, by zero-forcing receiving, in a case, distribution characteristics of power and noise of sub-carrier interference terms in phase noise of the receiving end after a polarization modulation scheme is adopted are argued, and finally, a result that the phase noise applied to the polarization modulation received signal can be transferred to additive noise is proved, so that influence of the phase noise is eliminated. The polarization modulation based phase noise elimination method disclosed by the invention solves a problem of reduction of traversal capacity, which is caused by influence of the phase noise on the massive MIMO-OFDM uplink system, and meanwhile, also solves problems of high investment and increase of a terminal cost price, which are caused by redesign of a low-phase-noise local oscillator.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a polar modulation-based phase noise elimination method in a massive MIMO-OFDM uplink system. Background technique [0002] With the advent of the wireless broadband network era, the massive MIMO-OFDM uplink system of massive MIMO (multiple input multiple output) combined with orthogonal frequency division multiplexing (OFDM) technology, with the increase in the number of antennas at both ends of the transceiver , while the data rate is greatly increased, the transmit power can also be greatly reduced. The acquisition of these gains is based on the acquisition of accurate channel state information. In massive MIMO / massive MIMO-OFDM uplink, in order to obtain the channel state information, the pilot signal is usually sent first, and the channel state is estimated at the receiving end through the prior information of the pilot signal, and then the channel is invaria...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/0413H04L25/03H04L27/26
CPCH04B7/0413H04L25/03159H04L27/2601H04L27/2627
Inventor 聂尧吴欢冯春燕符茂胜李军杰另大兵何富贵
Owner WEST ANHUI UNIV
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