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[Program doc] PhDThesisforLDPC DL : 0: 硕士学位论文:LDPC码在瑞利衰落信道中的性能分析信道编码技术可以带来编码增益，节省宝贵的功率资源，己经成为现代数字通信系统中必不可少的关键技术。LDPC码采用低复杂度的迭代译码算法，且具有逼近香农限的性能.由于LDPC码具有诸多优点，它在信息可靠传输中的良好应用前景己经引起学术界和rr业界的高度重视，成为当今信道编码领域最受瞩目的研究热点之一。本文主要探讨了LDPC码在瑞利衰落信道中的性能，基于LDPC码的分组空时码系统，以及基于LDPC码的正交频分复用系统.-master's degree thesis : LDPC codes in Rayleigh fading channels Performance Analysis channel coding technology can bring coding gain, Power saving valuable resources have become modern digital communication systems essential to the critical technologies. LDPC low complexity of the iterative decoding algorithm, having approximation Shannon limit performance. Because LDPC has many advantages, It reliable transmission of information in the application of good prospects has been caused rr academia and industry are taking, become the channel coding areas of the most watched one of the hot spots. This paper mainly discusses the LDPC Rayleigh fading channels in the performance Based on LDPC a space-time coding system, and based on LDPC orthogonal frequency division multiplexing system.
Date : 2025-12-31 Size : 2.25mb User : daniel
[Program doc] SIC_THP3 DL : 0: he term dirty paper coding comes Max Costa[1] who imagined a paper which is partially covered with dirt that is indistinguishable ink. The theorem says that if the writer knows where the dirt is to start with, she can convey just as much information by writing on the paper as if it were clean, even though the reader does not know where the dirt is. In this case the dirt is interference, the paper is the channel, the writer on the paper is the transmitter, and the reader is the receiver. In information-theoretic terms, dirty-paper coding achieves the channel capacity, without a power penalty and without requiring the receiver to gain knowledge of the interference state. Note that DPC at the encoder is an information-theoretic dual of Wyner-Ziv coding at the decoder[citation needed].-he term dirty paper coding comes Max Costa[1] who imagined a paper which is partially covered with dirt that is indistinguishable ink. The theorem says that if the writer knows where the dirt is to start with, she can convey just as much information by writing on the paper as if it were clean, even though the reader does not know where the dirt is. In this case the dirt is interference, the paper is the channel, the writer on the paper is the transmitter, and the reader is the receiver. In information-theoretic terms, dirty-paper coding achieves the channel capacity, without a power penalty and without requiring the receiver to gain knowledge of the interference state. Note that DPC at the encoder is an information-theoretic dual of Wyner-Ziv coding at the decoder[citation needed].
Date : 2025-12-31 Size : 10kb User : alan
[Program doc] MIMO-performance DL : 0: MU-MIMO is widely considered a key technology for system capacity improvement in modern wireless networks. In contrast to SU-MIMO, where the spatial multiplexing gain is confined to a single user, MU-MIMO allows multiple users to be co-scheduled on the same time-frequency resources to exploit this gain among two or more UE units. This is particularly beneficial as high-rank SU-MIMO transmission is often limited by the number of antennas and antenna design constraints at the user end, whereas high-rank transmission using MU-MIMO is more feasible due to the scattered user distribution. It is well known that the information theoretic optimal MU-MIMO scheme is dirty paper coding (DPC), which unfortunately is a nonlinear/ non-causal beamforming scheme and therefore unrealistic in real-life applications. From a practical deployment point of view, the most
Date : 2025-12-31 Size : 398kb User : nebiyu