Adaptive OFDM system with limited feedback using truncated channel impulse response

2015 ◽  
Author(s):  
N. Abou Aly ◽  
A. Al-Dweik ◽  
M. Al-Mualla
Keyword(s):  
Impulse Response ◽  
Limited Feedback ◽  
Channel Impulse Response ◽  
Ofdm System ◽  
Adaptive Ofdm

Analysis of the Channel Capacity under OFDM System with Insufficient CP

2014 ◽  
Vol 986-987 ◽  
pp. 2052-2055
Author(s):  
Xin Ya Liu ◽  
Hong Wen Yang
Keyword(s):  
Impulse Response ◽  
Channel Capacity ◽  
Cyclic Prefix ◽  
Monotonic Function ◽  
Channel Impulse Response ◽  
Ofdm System ◽  
Ofdm Signal

The standard OFDM signal requires a cyclic prefix (CP) of length larger than the channel impulse response. This paper investigates the effect of CP length to the capacity of OFDM system. We have found that full CP or none CP may not be optimal in the sense of capacity. Specifically, the capacity is a monotonic function of CP length in the low and high SNR regime and is approximately concave down when SNR is about 3dB.

scholarly journals Channel Sounding for the Masses: Low Complexity GNU 802.11b Channel Impulse Response Estimation

2012 ◽  
Vol 11 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Dustin Maas ◽  
Mohammad H. Firooz ◽  
Junxing Zhang ◽  
Neal Patwari ◽  
Sneha K. Kasera
Keyword(s):  
Impulse Response ◽  
Low Complexity ◽  
Channel Impulse Response ◽  
Channel Sounding ◽  
The Masses

scholarly journals Detection of Incoherent Signal In Molecular Communication Based on Channel Impulse Response

2021 ◽  
Vol 2136 (1) ◽  
pp. 012039
Author(s):  
Shanchao Wen
Keyword(s):  
Impulse Response ◽  
Background Noise ◽  
Molecular Diffusion ◽  
Detection Algorithm ◽  
Channel Impulse Response ◽  
Molecular Communication ◽  
Computing Power ◽  
Traditional Scheme ◽  
Molecular Signal ◽  
The Moment

Abstract In order to solve the problem of intercode interference (ISI) and background noise caused by molecular diffusion in molecular communication, Honda analyzed and studied four methods to resist ISI signal, and analyzed the characteristics of the received signal at the moment. A reliable incoherent molecular signal detection algorithm independent of channel impulse response (CIR) is proposed, and an adaptive threshold calculation method is designed, and the theoretical value of bit error rate (BER) is given. The simulation results show that the proposed scheme BER is lower than the traditional scheme BER under the same computational complexity, so it has a wide application prospect in the nanoscale molecular communication system with limited computing power.

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