Method and apparatus for noise estimation in orthogonal frequency division multiplexing system

Abstract

The invention discloses a method and an apparatus for noise estimation in an orthogonal frequency division multiplexing system, applied to solving the problem of complex noise estimation in the prior art. The method comprises the following steps of: according to a reference signal position of service configuration, aiming at each receiving antenna in a receiving end, performing a frequency domainchannel estimation in each time-slot of a sub-frame to obtain a channel estimation value of a resource block corresponding to the reference signal position of service configuration on a frequency domain of a corresponding time-slot; according to the obtained channel estimation value, selecting a resource block, and converting the channel estimation value corresponding to the selected resource block into channel estimation value on a time domain; calculating a mean power of each time-slot channel estimation value on the time domain outside of a set window length, and taking the mean power as anoise estimation value of the corresponding time-slot for each receiving antenna; selecting a minimum value from the time-slot noise estimation values in the sub-frame of each receiving antenna, and obtaining a noise estimation value of the sub-frame according to the minimum value.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for noise estimation in an Orthogonal Frequency Division Multiplexing (OFDM) system. Background technique [0002] In a communication system, the noise estimation of the signal at the receiving end plays a very important role in improving the system throughput. The necessity and urgency of noise estimation research lies in the fact that many algorithms implemented in today's communication systems need noise estimation information, and these key algorithms include digital demodulation, channel equalization, turbo decoding, cell switching, etc. [0003] The next generation wireless mobile communication system uses an OFDM system, such as a Long Term Evolution (LTE) system. [0004] In the OFDM system, in the existing noise estimation technology, the channel estimation value used on the resource occupied by the user is generally converted into the time do...

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Problems solved by technology

[0005] The present invention provides a method and device for noise estimation in an OFDM system to solve the problem of complex noise estimation in the prior art

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