帮忙翻译一段科技文,汉译英,采纳后50财富值

帮忙翻译一段科技文,汉译英,采纳后50财富值
在前面的工作中我们已经提出了在中继协作通信网络中应用随机的方法来构造分布式空时码,并且可以达到与分布式Alamouti 和Jafarkhani码相近的系统误码率.相比较传统MIMO(多输入多输出)系统,中继协作通信网络中继节点的数量不再受到系统带宽的限制.为了获得极大的协作分集增益,提高系统的传输稳定性.因此,提出应用在大规模中继协作通信网络中(6个中继节点以上)具有全速率的随机分布式空时码的编码与解码算法.本项目拟进一步采用随机的方法设置一系列具有随机特性的酉矩阵来实现分布式空时码的简单编码,旨在获得较大的协作分集增益.本项目将系统地提出随机分布式空时码编码的构造准则.并针对其非完全正交的特性,研究高效、低复杂度的解码算法,在保证系统性能失真极小的情况下解码复杂度与中继节点的数量是呈线性增长规律.

In previous work we have proposed the construction of distributed space-time code (DSTC) by using a random method in relay cooperative communication network.This can achieve a similar bit error rate compared to distributed Alamouti and Jafarkhani codes.Compared to traditional MIMO (Multiple Input Multiple Output) system,the number of the relay nodes is no longer subject to the bandwidth limitations of the system in the relay cooperative communication network.In order to obtain the maximum cooperative diversity gain and to improve the stability of the transmission system,the full-rate randomly distributed space-time code encoding and decoding algorithms applied in the large scale relay cooperative communication network (more than six relay nodes) are proposed.This project intends to further use random method to setup a series of unitary matrixes with random characteristics to realize DSTC simple coding so as to obtain greater cooperative diversity gain.This project will also systematically present the construction criteria to the randomly distributed space-time coding.Aiming at its non-completely orthogonal characteristics,high efficient and low-complexity decoding algorithms are studied.Under the condition of minimum distortion of the system performance,the decoding complexity and the number of the relay nodes show a law of linear growth.
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