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We address the problem of blind carrier frequency-offset (CFO) estimation in quadrature amplitude modulation, phase-shift keying, and pulse amplitude modulation communications systems.We study the performance of a standard CFO estimate, which consists of first raising the received signal to the Mth power, where M is an integer depending on the type and size of the symbol constellation, and then applying the nonlinear least squares (NLLS) estimation approach. At low signal-to noise ratio (SNR), the NLLS method fails to provide an accurate CFO estimate because of the presence of outliers. In this letter, we derive an approximate closed-form expression for the outlier probability. This enables us to predict the mean-square error (MSE) on CFO estimation for all SNR values. For a given SNR, the new results also give insight into the minimum number of samples required in the CFO estimation procedure, in order to ensure that the MSE on estimation is not significantly affected by the outliers.
標簽： frequency-offset estimation quadrature amplitude
上傳時間： 2014-01-22
上傳用戶：牛布牛
This paper investigates the design of joint frequency offset and carrier phase estimation of a multi-frequency time division multiple access (MF-TDMA) demodulator that is applied to a digital video broadcasting—return channel system via satellite (DVB-RCS). The proposed joint estimation algorithm is based on the interpolation technique for two correlation values in the frequency and phase domains. This simple interpolation technique can significantly improve frequency and phase resolution capabilities of the proposed technique without increasing the number of the correlation values. In addition, the overall block diagram of a digital communications receiver for DVB-RCS is presented, which was designed using the proposed estimation algorithms. Index Terms—Carrier phase estimation, DVB-RCS, frequency offset estimation, interpolation, joint estimation, MF-TDMA.
標簽： investigates estimation frequency carrier
上傳時間： 2015-12-30
上傳用戶：ls530720646
demodulates the FM modulated signal Y at the carrier frequency Fc (Hz). Y and Fc have sample frequency Fs (Hz). FREQDEV is the frequency deviation (Hz) of the modulated signal.
標簽： demodulates the modulated frequency
上傳時間： 2014-01-06
上傳用戶：皇族傳媒
uses the message signal X to modulate the carrier frequency Fc (Hz) and sample frequency Fs (Hz), where Fs > 2*Fc. FREQDEV (Hz) is the frequency deviation of the modulated signal.
標簽： frequency the modulate message
上傳時間： 2016-01-20
上傳用戶：569342831
The design for respiratory frequency detection circuit using thermosensor
標簽： thermosensor respiratory detection frequency
上傳時間： 2014-01-09
上傳用戶：zuozuo1215
KEELOQ CODE HOPPING SIMPLE DECODER USE 16C54
標簽： HOPPING DECODER KEELOQ SIMPLE
上傳時間： 2013-11-25
上傳用戶：mpquest
Orthogonal Time–Frequency Signalin Over Doubly Dispersive Channels，IEEE上的文章
標簽： Orthogonal Dispersive Frequency Channels
上傳時間： 2014-01-22
上傳用戶：xg262122
Generalized Mel frequency cepstral coefficients for large-vocabulary Speaker-Independent Continuous-Speech Recognition 關于MFCC算法的很好的英語文章
標簽： Speaker-Independent large-vocabulary coefficients Generalized
上傳時間： 2014-01-23
上傳用戶：liglechongchong
example frequency spectrum annlysis
標簽： frequency annlysis spectrum example
上傳時間： 2014-01-04
上傳用戶：zhangjinzj
RFID標準：iso18000-6（英文版）。 Information technology — Radio-frequency identification for item management — Part 6: Parameters for air interface communications at 860 MHz to 960 MHz
標簽： Radio-frequency identification Information technology
上傳時間： 2014-01-17
上傳用戶：cainaifa
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