Channel estimation method and device and communication system
A channel estimation and communication system technology, applied in the field of channel estimation method, device and communication system, can solve the problem of low accuracy of channel estimation value, and achieve the effect of suppressing inter-subcarrier interference and improving accuracy
Active Publication Date: 2011-05-04
HUAWEI TECH CO LTD
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[0019] In the process of implementing the present invention, the inventor found that at least the following technical problems exist in the prior art: when the prior art performs channel estimation, especially when performing channel estimation on a high-speed mobile communication system, the channel estimation value acquired less accurate
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[0035] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.
[0036] In wireless communication systems, especially for high-speed mobile communication systems, communication signals are seriously affected by inter-subcarrier interference caused by the Doppler effect, and the above-mentioned inter-subcarrier interference will affect the accuracy of channel estimation. An embodiment of the present invention provides a channel estimation method, which considers the interference between subcarriers when performing channel estimation, figure 1 It is a schematic flow chart of an embodiment of the channel estimation method of the present invention, such as figure 1 shown, including the following steps:
[0037] Step 101. Acquire a received signal, which includes a received pilot signal and a received data signal; this embodiment is a pilot-based channel estimation method, and the pilot...
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The embodiment of the invention provides channel estimation method and device and a communication system, wherein the channel estimation method comprises the steps of: obtaining a receiving signal, wherein the receiving signal comprises a received pilot frequency signal and a received data signal; obtaining an initial channel estimation value according to the received pilot frequency signal and an initial channel estimation matrix, wherein the initial channel estimation matrix comprises interference information among subcarriers; and carrying out iteration channel estimation according to the initial channel estimation value and the obtained receiving signal to obtain a subsequent channel estimation value. The embodiment of the invention also discloses a corresponding channel estimation device. The embodiment of the invention also provides a communication system comprising the channel estimation device. The channel estimation method and device as well as system provided by the embodiment of the invention consider the influence of the interference among the subcarriers and can improve the channel estimation accuracy.
Description
technical field [0001] The embodiments of the present invention relate to the technical field of mobile communication, and in particular to a channel estimation method, device and communication system. Background technique [0002] The transmitter and receiver of the wireless communication system use multiple antennas at the same time, which can greatly improve the signal capacity and reliability without increasing the bandwidth and transmission power. This technology is called Multiple Input and Multiple Output (MIMO, hereinafter Abbreviation: MIMO) technology. The multi-antenna system is combined with Space Time Coding (STC, Space Time Coding) to produce the effect of space diversity, which can reduce the bit error rate and improve the reliability of the system. The MIMO system can also adopt a layered space-time structure (BLAST, Bell Labs Layered Space Time) to form multiple parallel sub-channels, increase the channel capacity in the form of spatial multiplexing, and re...
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Login to View More IPC IPC(8): H04L27/26H04L25/03
CPCH04L25/0202
Inventor 李睿哈加瓦那·维波诺李永会卢赛蒂克.·布兰卡杨学志蒋伟
Owner HUAWEI TECH CO LTD