We propose an iterative design algorithm for jointly optimizing source and channel codes. The joint design combines channel-optimized vector quantization (COVQ) for the source code with rate-compatible punctured convolutional (RCPC) coding for the channel code. Our objective is to minimize the average end-to-end distortion. For a given channel SNR and transmission rate, our joint source and cha...

This paper presents a general framework for combined source-channel coding within the context of subband coding. The unequal importance of sub-bands in reconstruction of the source is exploited by an appropriate allocation of source and channel coding rates for the coding and transmission of subbands over a noisy channel. For each subband, the source coding rate as well as the level of protecti...

We propose three new design algorithms for jointly optimizing source and channel codes. The joint designs combine channel-optimized vector quantization (COVQ) for the source code with rate-compatible punctured convolutional (RCPC) coding for the channel code. Our objective is to minimize the average end-to-end distortion. For a given channel SNR and transmission rate, our joint source and chann...

In large multiple-input multiple-output (MIMO) systems, we offer a new access strategy for crowd situations. Crowd situations include high number users who have intermittent patterns, making orthogonal scheduling impossible. this paper, the work is driven by massive MIMO problem at crowded environment. The pilot contamination dependent on protocol assumptions observed in system. We investigate ...

In this paper, the channel segregation dynamic channel allocation (CS-DCA) scheme is applied to a multi-hop DS-CDMA virtual cellular network (VCN). After all multi-hop routes are constructed over distributed wireless ports in a virtual cell, the CS-DCA is carried out to allocate the channels to multi-hop up and down links. Each wireless port is equipped with a channel priority table. The transm...

As one of the promising approaches to increase the network capacity, Full-duplex (FD) communications have recently gained a remarkable attention. FD communication enables wireless nodes to simultaneously send and receive data through the same frequency band. Thanks to the recent achievements in the self-interference (SI) cancellation, this type of communication is expected to be potentially uti...

The thesis determines the optimal policy (out of successive decoding and FDMA) that minimizes the sum power of the users in the presence of coding gap while meeting their minimum rate requirements in a time-varying channel for the uplink setup. It is shown that, in the presence of coding gap, successive decoding is no longer an optimal policy in all channel states and that there are certain cha...

M.Padmaja , K.Prasuna 2 Assistant Professor, VR Siddhartha Engineering College, Vijayawada (A.P), INDIA [email protected] Assistant Professor, Vijaya Institute of Technologyforwomen, Vijayawada (A.P), INDIA [email protected] AbstractOptimized root mean square error plays an important role in the analysis of wireless transmission. In this paper, an optimized power allocation method is ...

M.Padmaja, K.Prasuna Assistant Professor, VR Siddhartha Engineering College, Vijayawada (A.P), INDIA [email protected] Assistant Professor, Vijaya Institute of Technologyforwomen, Vijayawada (A.P), INDIA [email protected] AbstractOptimized root mean square error plays an important role in the analysis of wireless transmission. In this paper, an optimized power allocation method is con...