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- 擴頻QPSK調制DSSS/QPSK
- QPSK調制QPSK modulate
- 一種達到理論上限的新型擴頻序列集A Novel Spread Spectrum Sequence Set up to Upper Bound of Theory
- LMDS中QPSK調制技術(shù)的DSPs實(shí)現The Implementation of QPSK in LMDS Using DSPs
- 偽碼QPSK調制的功率譜分析和實(shí)驗研究POWER SPECTRUM ANALYSIS AND EXPERIMENTAL RESEARCH OF PN CODE MODULATED QPSK WAVES
- 頻域擴頻碼片級差分檢測的誤碼率性能分析Analysis of the BER Performance of Chip-Level Differential Detection for Frequency Domain Spread Spectrum System
- 高速擴頻微波組網(wǎng)技術(shù)在防震減災中的應用Application of the technique of high-speed frequency spread microwave network in earthquake disaster prevention and mitigation
- 載波相位噪聲對QPSK調制解調的影響是不可忽略的,也是難以分析的。The effect on modulation and demodulation of QPSK via carrier phase noise can not be ignored, and it is difficult to analyze.
- 頻數frequence
- 主頻dominant frequency
- 一種電力線(xiàn)載波擴頻通信芯片的設計與實(shí)現Design and implementation of spread-spectrum IC for data communication over power line
- 倍頻frequency doubling
- 其次，介紹了其信號的頻段選擇、電磁兼容性及其調制和產(chǎn)生的基本原理，包括L5測距碼、卷積碼、QPSK調制以及Neuman.Secondly, it introduces the frequency selection, EMC(Electromagnetic Compatibility), the basic generation theory and modulation of the third civil signal(L5 signal), including LS ranging code, Forward Error Correction, QPSK modulation and Neuman.
- 載頻carrier frequency
- 分頻frequency demultiplication
- 而對于QPSK調制信號，在SOI和干擾的頻譜重疊部分為SOI總帶寬的45%時(shí)，CMA-DD FRESH濾波器有大約0.6dB的信噪比改善量。for QPSK-modulated signals, when the spectral overlap between SOI and the interference accounts for 45%25 of the total SOI bandwidth, CMA-DD FRESH filter can improve SNR by 0.6dB.
- 分頻器frequency demultiplier
- 混沌擴頻技術(shù)在CDMA通信系統中的應用研究Research on Application of Chaotic Spreading Spectrum Technology to CDMA Communication Systems
- 從降低解擴電路功耗和提高運算速度兩方面考慮,針對采用QPSK調制的寬帶碼分多址(WCDMA)信號,提出了一種數?；旌闲徒鈹U方法。To reduce the power dissipation and improve the operation speed, a new mixed analog-digital algorithm for despreading of QPSK modulated WCDMA signals is presented.
- 多進(jìn)制正交擴頻系統中軟信息提取電路的實(shí)現Implement of Extracting Circuit for Soft-information in M-ary Orthogonal Code Spread-spectrum System
