1. 西安交通大学电子与信息工程学院,西安,710049
2. 西安理工大学自动化与信息工程学院,西安,710048
网络首发:2009-02-10,
纸质出版:2009
移动端阅览
牛兰奇 1, 2, 张太镒 1, 等. 采用帧延迟的实时编码协作方案[J]. 西安交通大学学报, 2009,43(2):63-66.
牛兰奇 1, 2, 张太镒 1, et al. A Real Time Coding Cooperation Scheme with on Frame Delay[J]. 2009, 43(2): 63-66.
为了解决码分多址(CDMA)和频分多址(FDMA)编码协作系统中协作用户之间存在的冲突和碰撞问题
提出了一种采用帧延迟的实时编码协作方案.该方案将用户信道码字分割为2部分
如果某个用户对协作伙伴前一帧数据成功译码
则将协作伙伴前一帧码字的第2部分冗余作为协作信息传输
否则传输自身当前帧码字的第2部分冗余
从而实现实时编码协作.此外
还利用紧联合界技术推导了新方案的误比特率估计公式
给出了数值计算结果. 数值结果表明:采用帧延迟的实时编码协作方案能够很好地解决CDMA和FDMA编码协作系统中协作用户之间的碰撞问题
但会有少量的性能损失
对于0 dB互易用户间信道
性能损失为1.2 dB.
To solve the collision problem between the partners in code-division multiple access(CDMA)and frequency-division multiple access(FDMA)coding cooperative systems
a new real time coding cooperation scheme is proposed with frame delay. The scheme partitions the user channel codeword into two parts. If one user decodes successfully his partner's previous frame data
he then transmits the second redundancy of the partner's previous frame as cooperative information
otherwise he transmits the second redundancy of his own codewords
so that the real coded cooperation is implemented. Furthermore
the bit-error-rate evaluation formula of the new scheme is derived using the tightening union bound techniques. Numerical results show that the real coding cooperation scheme with frame delay can solve the collision problem between the partners in CDMA and FDMA coding cooperative systems very well
but the proposed scheme would result in a little performance loss of 1.2 dB for 0 dB reciprocal inter-user channels.
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LANEMAN J N, TSE D N C, WORNELL G W. Cooperative diversity in wireless networks: efficient protocols and outage behavior [J]. IEEE Transactions on Information Theory, 2004,50(12):3062-3080.
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王琳, 徐位凯. 高效信道编译码技术及其应用[M]. 北京:人民邮电出版社, 2007.
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