为提高空域索引调制技术的信息传输速率,提出分组空码索引调制(grouping space code index modulation,GSCIM)方案。结合空间调制(spatial modulation,SM)和码索引调制(code index modulation,CIM),利用分组思想增加调制信息比特、天线...为提高空域索引调制技术的信息传输速率,提出分组空码索引调制(grouping space code index modulation,GSCIM)方案。结合空间调制(spatial modulation,SM)和码索引调制(code index modulation,CIM),利用分组思想增加调制信息比特、天线索引信息比特和伪随机(pseudo noise,PN)码索引信息比特。分析和仿真结果表明,当信息传输速率相同时,与其它索引调制方案相比,GSCIM方案可以至少节省一半的索引资源,具有更好的误比特率性能,随着信息传输速率的提高,这些优势更明显。展开更多
This paper proposes a modification of the soft output Viterbi decoding algorithm (SOVA) which combines convolution code with Huffman coding. The idea is to extract the bit probability information from the Huffman codi...This paper proposes a modification of the soft output Viterbi decoding algorithm (SOVA) which combines convolution code with Huffman coding. The idea is to extract the bit probability information from the Huffman coding and use it to compute the a priori source information which can be used when the channel environment is bad. The suggested scheme does not require changes on the transmitter side. Compared with separate decoding systems, the gain in signal to noise ratio is about 0 5-1.0 dB with a limi...展开更多
4.5基带数字信号处理4.5.8数据解调和数据处理Data Demodulation and Data Processing为了解码导航电文（navigation message）,即调制有卫星轨道星历（ephemeris）和卫星原子钟钟差（satellite clock information）等信息的导航数据信...4.5基带数字信号处理4.5.8数据解调和数据处理Data Demodulation and Data Processing为了解码导航电文（navigation message）,即调制有卫星轨道星历（ephemeris）和卫星原子钟钟差（satellite clock information）等信息的导航数据信息比特（data bits）,展开更多
文摘为提高空域索引调制技术的信息传输速率,提出分组空码索引调制(grouping space code index modulation,GSCIM)方案。结合空间调制(spatial modulation,SM)和码索引调制(code index modulation,CIM),利用分组思想增加调制信息比特、天线索引信息比特和伪随机(pseudo noise,PN)码索引信息比特。分析和仿真结果表明,当信息传输速率相同时,与其它索引调制方案相比,GSCIM方案可以至少节省一半的索引资源,具有更好的误比特率性能,随着信息传输速率的提高,这些优势更明显。
文摘This paper proposes a modification of the soft output Viterbi decoding algorithm (SOVA) which combines convolution code with Huffman coding. The idea is to extract the bit probability information from the Huffman coding and use it to compute the a priori source information which can be used when the channel environment is bad. The suggested scheme does not require changes on the transmitter side. Compared with separate decoding systems, the gain in signal to noise ratio is about 0 5-1.0 dB with a limi...
文摘4.5基带数字信号处理4.5.8数据解调和数据处理Data Demodulation and Data Processing为了解码导航电文（navigation message）,即调制有卫星轨道星历（ephemeris）和卫星原子钟钟差（satellite clock information）等信息的导航数据信息比特（data bits）,
