Joint CFO/SCO estimation and compensation in frequency domain on LTE platform
碩士 === 國立交通大學 === 資訊科學與工程研究所 === 99 === This thesis is dedicated to design of frequency-domain frequency and timing synchronizer for 1024-point FFT Orthogonal Frequency Division Multiplexing (OFDM) communication system. The proposed algorithm takes advantage of rotation phase and the changing speed...
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| Format: | Others |
| Language: | en_US |
| Published: |
2011
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| Online Access: | http://ndltd.ncl.edu.tw/handle/12354104412711797959 |
| Summary: | 碩士 === 國立交通大學 === 資訊科學與工程研究所 === 99 === This thesis is dedicated to design of frequency-domain frequency and timing
synchronizer for 1024-point FFT Orthogonal Frequency Division Multiplexing
(OFDM) communication system. The proposed algorithm takes advantage of rotation
phase and the changing speed of phase.
This thesis uses the known reference signal (pilot) to do both carrier frequency
offset and sampling clock offset estimation. It compares the difference of phase
between received signal and ideal reference signal and uses these information to
design the algorithm. The residual CFO and SCO estimation uses the falling number
of received signal close to ideal reference signal on constellation to do further
compensation.
This proposed algorithm is based on 3GPP Long Term Evolution. It works in
the environment with AWGN, Multipath, CFO and SCO effects. It only loss
0.3~1.5dB compared to optimal solution when BER is below 1%. It can tolerate CFO
up to 25ppm and SCO up to 300ppm.
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