本文研究了超宽带通信中的编码和调制技术。
In this thesis, the coding and modulation techniques in UWB communications are studied.
开发高效的编码、调制以及信号处理技术成为提高无线频率效率的必然手段和当务之急。
To develop highly efficient coding, modulation and signal processing technologies is becoming the most necessary measure to realize these demands.
本文论述了一种基于软件无线电的甚低频低码率语音数字岩层通信机，它采用了QPSK调制和FEC信道编码技术。
This paper deals with a digital speech communicator of very low frequency and low bit digital communication based on software ratio, which USES the technique of QPSK and FEC coding.
在对加密算法实现过程进行可行性研究和分析的基础上，阐述了应用adpcm编码调制技术和UDP协议进行网络环境下实时多点语音通信的方法。
Based on the feasibility study and the analysis to the encryption algorithm, the paper presents a method of the real-time multi-point voice communication in network, which USES ADPCM and UDP.
该模型支持采用自适应调制和编码(AMC)的多速率非理想信道，而AMC在无线网络中是增加有效传输率的关键技术。
The model supports the multi-rate non-ideal channel using adaptive modulation and coding (AMC), which is the key feature in the wireless networks to increase the effective transmission rate.
信道编码采用了典型的内外层编码技术和QAM调制技术。
Channel coding USES the classic outer, inner coding structure and QAM.
在发送端，主要研究了差错控制编码，波形成形、扩频和8PSK调制等关键技术；
On the sending end, the paper focuses on Error Control Coding, Waveform Shaping, Spread Spectrum and 8PSK modulation, etc.
网格编码调制（TCM）技术是一种将卷积编码和调制结合在一起的技术。
The invention relates to a neural network demodulating method based on the trellis encoding and modulating (TCM) technology which combines the convolutional encoding with the modulating.
网格编码调制（TCM）技术是一种将卷积编码和调制结合在一起的技术。
The invention relates to a neural network demodulating method based on the trellis encoding and modulating (TCM) technology which combines the convolutional encoding with the modulating.
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