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SINR estimation method based on multi-antenna diversity scheme of DFT-S-GMC system

A DFT-S-GMC, diversity scheme technology, applied in the field of SINR estimation, can solve the problems of transmitted signal spectrum leakage, signal out-of-band interference, signal distortion, etc.

Inactive Publication Date: 2008-12-31
SHANGHAI RES CENT FOR WIRELESS COMM
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Problems solved by technology

If the smear in the multi-subband filtered signal is directly truncated, on the one hand, it will cause signal distortion, and on the other hand, it will cause spectrum leakage of the transmitted signal, resulting in out-of-band interference of the signal

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  • SINR estimation method based on multi-antenna diversity scheme of DFT-S-GMC system

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[0092] In the SINR estimation method based on the multi-antenna diversity scheme of the DFT-S-GMC system of the present invention, the DFT-S-GMC system with 2 transmitting antennas and Nr receiving antennas is mainly used as an example to describe in detail, and the method mainly includes the following steps :

[0093] The first step: establish a mathematical model between the signal input and output of the DFT-S-GMC system

[0094] It can be seen from the existing DFT-S-GMC transmission scheme that each received data block is obtained by shifting and accumulating (multiplexing) several time-domain waveform symbols (see Equation 6). However, since the prototype filter satisfies shift orthogonality (see Equation 4), it can be approximately considered that the multiplexed time-domain waveform symbols in the equalized data block do not interfere with each other, which can be confirmed in subsequent simulations. Therefore, for simplicity of analysis, only one time-domain waveform...

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Abstract

The invention relates to an SINR (Signal Interference-to-Noise Ratio) estimation method based on DFT-S-GMC (Discrete Fourier Transform Spread Generalized Multi-Carrier) system multiple antenna diversity schemes. The effective signal interference-to-noise ratio for the DFT-S-GMC multiple antenna diversity scheme can be calculated accurately in a way that: a mathematical model for signal input and output in the DFT-S-GMC system is constructed firstly, then according to channel frequency response, channel noise variance and equilibrium approaches, an equilibrium factor of a frequency-domain equalization sub-carrier in the DFT-S-GMC system is set up; average power of the wanted signal of the DFT-S-GMC system receiving end, average power and noise variance of inter-signal interference are calculated respectively based on the mathematical model and the frequency-domain equilibrium factor; then the effective signal interference-to-noise ratio is calculated. The invention can be used for both mapping interfaces from link-level simulation to system-level simulation for the DFT-S-GMC multiple antenna diversity transmission scheme, and the link adaptation technology and wireless resource scheduling technique, etc. providing support for Adaptive Coding Modulation based on the transmission scheme.

Description

technical field [0001] The invention relates to a SINR estimation method based on a multi-antenna diversity scheme of a DFT-S-GMC system. Background technique [0002] Single-carrier frequency-division multiple access (SC-FDMA) is a new type of frequency-division multiple access communication proposed in the world in recent years that not only has the peak-to-average ratio of single-carrier communication, but also has the characteristics of simple implementation of multi-carrier communication and flexible resource scheduling. The system is mainly used in the uplink solution of broadband mobile communication. At present, there are two implementations of SC-FDMA, one is SC-FDMA [5-8] based on OFDM (A) technology, and the other is SC-FDMA based on filter bank transformation. For SC-FDMA based on OFDMA technology, there are two implementation forms, one is SC-FDMA through frequency domain processing, that is, Orthogonal Frequency Division Multiple Access (DFT-S-OFDMA) based on ...

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Application Information

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IPC IPC(8): H04B7/04H04B7/26
Inventor 芮赟李明齐张小东李元杰熊勇周秦英
Owner SHANGHAI RES CENT FOR WIRELESS COMM
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