Downlink joint processing CoMP channel estimation with partial channel state information in LTE Advanced system

2014 ◽  
Author(s):  
R. Vijayarani ◽  
L. Nithyanandan
Keyword(s):  
Channel Estimation ◽  
Channel State Information ◽  
Channel State ◽  
State Information ◽  
Joint Processing ◽  
Lte Advanced ◽  
Partial Channel ◽  
Advanced System

Multiplexing SRS with Periodic CSI on Shortened PUCCH Format 2/2a/2b

2014 ◽  
Vol 556-562 ◽  
pp. 6063-6067
Author(s):  
Dan Wang ◽  
Xue Mei Deng ◽  
Xin Ni
Keyword(s):  
Channel State Information ◽  
Reference Signal ◽  
Control Channel ◽  
Channel State ◽  
State Information ◽  
Similar Performance ◽  
Lte Advanced ◽  
Advanced System ◽  
Simultaneous Transmission

In order to avoid dropping the SRS report frequently in case of collision between SRS and a periodic CSI report in LTE-Advanced system, this paper gives shortened PUCCH (Physical Uplink Control Channel) format 2/2a/2b for multiplexing SRS (Sounding Reference Signal) with periodic CSI (Channel State Information). The result of simulation shows that the shortened PUCCH format 2/2a/2b can effectively support simultaneous transmission periodic CSI and SRS. What’s more, on shortened PUCCH format 2/2a/2b with the first and last two encoded bits punctured, periodic CSI and HARQ-ACK feedback have the same performance as on PUCCH format 2/2a/2b without multiplexing SRS. Hence through the shortened PUCCH format 2/2a/2b, we can not only enhance simultaneous transmission of periodic CSI and SRS, but also guarantee the similar performance of periodic CSI and HARQ-ACK feedback as transmitting them on PUCCH format 2/2a/2b without multiplexing SRS.

scholarly journals A Novel Channel Estimation Technique in MIMO-OFDM Mobile Communication Systems

2020 ◽  
Vol 9 (02) ◽  
pp. 08-14
Author(s):  
Dr. V. Arthi
Keyword(s):  
Wireless Communication ◽  
Channel Estimation ◽  
Channel State Information ◽  
Communication Systems ◽  
Broad Band ◽  
Wireless Communication Systems ◽  
Channel State ◽  
Multimedia Services ◽  
State Information ◽  
Dynamic Estimation

4G Wireless communication systems have the inherent capability to foster the multimedia services in terms of bandwidth and data rate. These systems have very high integrity compared to the conventional wireless communication systems. It can fully support extended multimedia services with High Definition quality, audio and video files. Wireless internet and other broad band services provided superior quality signal transmission and reception. The degree of freedom enjoyed by the technology in terms of scalability and reliability is highly commendable. Any basic wireless transmitter sends information by varying the phase of the signal. In the receiver end, the desired signal can be decoded by appropriate decoding algorithm. The degradation occurs at the conventional receivers due to lack of Channel State Information. The efficiency of 4G system purely relies on the performance of receiver and is purely dependent on the synchronization of estimated instantaneous channel. In any wireless terminal, channel state information provides the in and around status of the channel. It provides the following parameters of the propagating signal (ie) Scattering, Fading and Attenuation. The dynamic estimation of channel state information can be obtained through Enhanced Least Squares channel estimation algorithm. It is based on Multi Carrier Filter Bank Transmission system. This  kind of dynamic estimation can be done with a set of well-known sequence of  coded unique bits .For a transmitter the information propagation is initiated in the form of frame bursts. It enhances the throughput of the system to the required level.

scholarly journals Exploiting Array Pattern Synthesis for Physical Layer Security in Millimeter Wave Channels

Electronics ◽  
2019 ◽  
Vol 8 (7) ◽  
pp. 745 ◽  
Author(s):  
Jong-Ho Lee ◽  
Jeongsik Choi ◽  
Woong-Hee Lee ◽  
Jiho Song
Keyword(s):  
Millimeter Wave ◽  
Channel State Information ◽  
Physical Layer Security ◽  
Physical Layer ◽  
Channel State ◽  
Pattern Synthesis ◽  
State Information ◽  
Array Pattern ◽  
Beamformer Design ◽  
Partial Channel

In this paper, we propose a beamformer design scheme for wireless physical layer security using partial channel state information (CSI) in millimeter wave channels. The partial CSI used in this work is the range of angle-of-departure (AOD). Assuming that the AOD range of each node is available, we design a transmit beamformer using semidefinite programming based on array pattern synthesis. Numerical results are presented to verify the secrecy rates achieved by the proposed scheme.

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