Gray modeling-based OFDM narrow-band slow-fading slowly time-varying channel estimation method
A channel estimation and slow fading technology, applied in baseband system components, multi-frequency code systems, etc., can solve problems such as high algorithm complexity, algorithm performance degradation, and poor application in high-speed mobile communication environments
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[0054] 1. Description of related symbols
[0055] OFDM (Orthogonal Frequency Division Multiplexing) Orthogonal Frequency Division Multiplexing
[0056] f d Maximum Doppler Shift
[0057] h (0) time-domain channel gain sequence
[0058] L Number of pilots inserted per OFDM symbol
[0059] N length of one OFDM symbol
[0060] M Number of OFDM symbols in one frame time
[0061] magnitude raw sequence
[0062] Amplitude accumulation sequence
[0063] magnitude background sequence
[0064] a am Development Coefficient of Amplitude Gray Model
[0065] b am The gray input of magnitude gray model
[0066] C am 、D am ,E am and F am The intermediate parameters of the magnitude gray model
[0067] Amplitude accumulation sequence predicted value of
[0068] actual predicted value of magnitude
[0069] pH min Minimum phase in phase sequence
[0070] pH max Maximum phase in phase sequence
[0071] phase raw sequence
[0072] phase accumulation sequenc...
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