Title :
Limited feedback in OFDM systems for combating ISI/ICI caused by insufficient cyclic prefix length
Author :
Zochmann, Erich ; Pratschner, Stefan ; Schwarz, Stefan ; Rupp, Markus
Author_Institution :
Inst. of Telecommun., Tech. Univ. Wien, Vienna, Austria
Abstract :
In 3GPP LTE communication systems, channel state information is fed back by means of the channel quality indicator, the precoding matrix index and the rank indicator. This limited feedback information is used to adapt the transmission scheme such as to improve the throughput and to reach a certain target block error ratio. Based on the channel impulse response we calculate the interference power caused by insufficient cyclic prefix length. By accounting for this inter symbol and inter carrier interference power in the feedback calculation, we obtain an improved throughput in OFDM systems.
Keywords :
3G mobile communication; Long Term Evolution; OFDM modulation; intercarrier interference; intersymbol interference; transient response; wireless channels; 3GPP LTE communication system; ISI-ICI combatement; OFDM system; block error ratio; channel impulse response; channel quality indicator; channel state information; insufficient cyclic prefix length; intercarrier interference power; intersymbol interference power; limited feedback information; precoding matrix index; rank indicator; Discrete Fourier transforms; Equalizers; Interference; Noise measurement; OFDM; Signal to noise ratio; Throughput;
Conference_Titel :
Signals, Systems and Computers, 2014 48th Asilomar Conference on
Print_ISBN :
978-1-4799-8295-0
DOI :
10.1109/ACSSC.2014.7094601
