Method for ensuring channel phase continuity among resource block (RB) groups after precoding, and base station

A precoding and continuity technology, applied in wireless communication, baseband system, space transmit diversity, etc., can solve the problems of fragmentation, discontinuous channel phase, affecting the performance of BF system, etc.

Active Publication Date: 2014-10-15
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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Problems solved by technology

However, since the frequency-domain resource blocks (RB, Resource Blocks) of the channel phase are originally continuous, however, considering the complexity and realizability of the actual system and equipment, the BF weights are based on the RB group as the granularity, so Different RB groups use their own independent BF weight vectors, so that the channel phases between RB groups are no longer continuous, and there ...

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  • Method for ensuring channel phase continuity among resource block (RB) groups after precoding, and base station
  • Method for ensuring channel phase continuity among resource block (RB) groups after precoding, and base station
  • Method for ensuring channel phase continuity among resource block (RB) groups after precoding, and base station

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Embodiment Construction

[0052] The technical solutions of the present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0053] An embodiment of the present invention provides a method for ensuring channel phase continuity between RB groups after precoding, such as figure 1 As shown, it mainly includes:

[0054] Step 101, the base station performs channel estimation by sounding signal measurement (SRS, Sounding Reference Signal), and obtains the uplink channel H UL , and obtain the corresponding downlink channel H based on the reciprocity of uplink and downlink channels DL .

[0055] For the convenience of description, in the subsequent embodiments of the present invention, H DL Referred to as H, the dimension of H is T X *R X , where T X Indicates the number of antennas configured at the transmitter, R X Indicates the number of antennas configured at the receiving end.

[0056] Step 102, the base station calculates a weight ph...

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Abstract

The invention discloses a method for ensuring channel phase continuity among resource block (RB) groups after precoding, and a base station. The method comprises: the base station carrying out channel estimation through sounding reference signals (SRSs), and obtaining an uplink channel, and based on reciprocity between the uplink channel and a downlink channel, obtaining the corresponding downlink channel; the base station, based on the obtained downlink channel, calculating a weight phase correction factor, and correcting a precoding weight by use of the weight phase correction factor; and the base station, according to the corrected precoding weight, carrying out data precoding and transmission. According to the invention, the channel phase continuity among the RB groups after the precoding can be ensured, and the system performance and the frequency spectrum efficiency are improved.

Description

technical field [0001] The invention relates to precoding technology in the field of wireless communication, in particular to a method and base station for ensuring channel phase continuity between RB groups after precoding. Background technique [0002] Beamforming (BF, Beamforming) technology is a key Multiple Input Multiple Output (MIMO, Multiple Input Multiple Output) technology supported by Time Division Duplex Long Term Evolution (TDD-LTE, Time Division Dulpexing Long Term Evolution) system. However, since the frequency-domain resource blocks (RB, Resource Blocks) of the channel phase are originally continuous, however, considering the complexity and realizability of the actual system and equipment, the BF weights are based on the RB group as the granularity, so Different RB groups adopt their own independent BF weight vectors, so that the channel phases between the RB groups are no longer continuous, and there is a separation. Due to the phenomenon of phase discontin...

Claims

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Application Information

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IPC IPC(8): H04L25/02H04L1/00H04B7/06
CPCH04W24/00H04B7/06H04B7/0456H04B7/0421H04B7/0452H04B7/063H04B7/0634H04B7/0682H04B17/24H04L25/0224H04L25/03343H04L25/0222H04B17/309H04B7/043
Inventor 孙宝玉赵亚军李玉洁张新莫林梅徐汉青陈国峰黄琛
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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