Patent
Radio communication terminal and interference canceling method
TLDR
In this paper, transmitting selection diversity is applied in a CDMA radio communication system in which a BS carries out communications with a MS provided with MUD, and interference from other users and fading influences are mitigated.Abstract:
In a radio communication terminal apparatus or an interference cancellation method a known signal is adopted as a common midamble, transmitting selection diversity which applied in a CDMA radio communication system in which a BS carries out communications with a MS provided with MUD, and interference from other users and fading influences are mitigated. The signal transmitted from base station apparatus 101 which is provided with a plurality of antenna branches and performs transmitting selection diversity is received, in symbol power calculating section 150, the symbol power of all codes excluding the code assigned to the radio-communication terminal apparatus is calculated for every antenna branch, in code number detecting section 208, interference code number is detected for every antenna branch based on a known signal included in the receiving signal, in interference code selecting section 209, interference code corresponding to the detected interference code number is selected for every antenna branch based on the calculated symbol power, and interference caused by the selected interference code is cancelled by interference cancellation processing in MUD 210.read more
Citations
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References
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Patent
Apparatus and methods for intereference cancellation in spread spectrum communications systems
TL;DR: In this paper, a signal is resolved into a plurality of multipath signal components by descrambling the received signal according to a cell-specific scrambling code, and the resolved plurality of signal components is correlated with the set of spreading sequences to generate a respective set of correlations for a respective one of the resolved signal components.
Patent
CDMA multi-user receiving apparatus including interference canceller with optimal receiving state
TL;DR: In this article, a multi-user CDMA interference canceller with a multiplicity of stages is presented, which includes an interference estimating section for each plurality of user signals and a synthesizing unit that outputs a residual signal for the next stage.
Patent
DS-CDMA multi-user interference canceller and DS-CDMA Communication system
TL;DR: In this article, a DS-CDMA multi-user interference canceller is provided with a notifying unit for symbol information, a delay for each path and transmission estimation value information of each path to other users, a correlation value calculator for calculating cross correlation values with spread code sequences of the other users in each user in advance, an interference calculation for calculating interference components of other users on the basis of the information notified by other users and the cross correlation value calculated in advance.
Patent
Methods and apparatus for coherent detection of signals with orthogonal data modulation
TL;DR: In this article, a matched filter bank provides a set of matched filter outputs for different combinations of data symbols, multipath components of a received signal, and base station receive antennas.
Patent
Interference canceller device and radio communication device
TL;DR: In this paper, the authors present an interference cancellation for a DS-CDMA communication system and a radio communication device that performs multi-rate transmission and eliminates interference of high-rate channels by a simplified structure.