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Interference rejection combining method and device

A technology for interference suppression and noise interference, applied in diversity/multi-antenna systems, space transmit diversity, baseband system components, etc., can solve problems such as system data throughput decline, computational complexity increase, and real-time performance degradation

Active Publication Date: 2013-10-30
SANECHIPS TECH CO LTD
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Problems solved by technology

[0018] The present invention provides an interference suppression combining method and device, to at least solve the problem of increased computational complexity, reduced system data throughput, and reduced real-time performance caused by first performing channel estimation interpolation and then constructing a combined weight matrix for equalization in the prior art. technical issues

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  • Interference rejection combining method and device
  • Interference rejection combining method and device

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Embodiment 1

[0087] In this preferred embodiment, MMSE is taken as an example for illustration:

[0088] Such as Figure 6 Shown is a schematic diagram of a time-frequency structure of an uplink subframe in an LTE system. Wherein, one subframe includes two time slots. In the time domain, one slot includes 7 SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols (1=0...6). In the frequency domain, each symbol occupies 1200 useful information subcarriers (k=0...1999). There are pilot symbols on the 4th symbol of slot 0 and the 4th symbol of slot 1, which are used to transmit the reference signal of UE (User Equipment).

[0089] in accordance with Figure 6 The schematic diagram of the time-frequency structure is shown, and the method of IRC equalization method is carried out with the MMSE criterion, such as Figure 7 shown, including the following steps:

[0090] Step S702: Acquire channel estimation values ​​on pilot symbols.

[0091] Wherein, the above step S702 include...

Embodiment 2

[0142] In this preferred embodiment, the IRC merger of the SNR method is used as an example for illustration:

[0143] In this embodiment still as Figure 6 What is shown is a schematic diagram of a time-frequency structure of an uplink subframe in an LTE system for illustration.

[0144] in accordance with Figure 6 The schematic diagram of the time-frequency structure shown, the method of IRC equalization with the SNR method, such as Figure 10 shown, including the following steps:

[0145] Step S1002: Obtain channel estimation values ​​on pilot symbols.

[0146] Wherein, the above step S1002 includes:

[0147] Obtain the rough channel estimate H on each subcarrier on the 2 pilot symbols C (i SLOT , l DMARS ,k,ka RX ) and the fine channel estimate H R (i SLOT , l DMARS ,k,ka RX ), where i SLOT =0, 1 is the time slot index, l DMARS =3, 10 is the index of the pilot time domain symbol, k=0, 1...1199 is the frequency domain subcarrier index, ka RX =0, 1...7 are re...

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Abstract

The invention discloses an interference rejection combining method and device. The interference rejection combining method comprises the steps that a precomputation factor corresponding to a pilot symbol is obtained according to a channel estimation matrix and a noise jamming matrix of the pilot symbol, wherein the precomputation factor is used for united interpolation and equilibrium operation of received data corresponding to the pilot symbol; the interpolation and the equilibrium operation of the received data corresponding to the pilot symbol are conducted according to the precomputation factor. The interference rejection combining method and device solve the technical problems that in the prior art, channel estimation interpolation is conducted firstly, then, weight matrixes are constructed and combined for equilibrium, and therefore the operational complexity is enhanced, the data throughput rate of a system is reduced, and the real-time performance is lowered. The interference rejection combining method and device achieve the technical effects of lowering the operational complexity, increasing the throughput of the system, and improving the real-time performance of data processing.

Description

technical field [0001] The present invention relates to the communication field, in particular to an interference suppression combining method and device. Background technique [0002] For cellular mobile communication systems, there is a big difference between the data rate at the center of the cell and the data rate at the edge of the cell, which not only limits the capacity of the entire system, but also makes the quality of service obtained by users at different locations very different. big difference. Currently, a new generation of broadband wireless communication systems being developed, such as Long Term Evolution (LTE for short) and Worldwide Interoperability for Microwave Access (Wimax for short), will improve cell edge performance as a One of the main indicators of system performance. [0003] Moreover, in order to improve spectrum utilization and ensure the coexistence of cells with different communication standards, the LTE system will face more severe co-chan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04L25/03H04B7/08
Inventor 王鹏
Owner SANECHIPS TECH CO LTD
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