Patent
Interference canceller device and radio communication device
TLDR
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.Abstract:
The present invention is directed to an interference canceller 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. In a DS-CDMA communication system that performs a multi-rate transmission including at least low-rate channels and high-rate channels, there is provided an interference canceller that includes an array antenna interference replicating unit. The interference replicating unit is used in high-rate channels that receive signals received via array antenna elements and creates interference replicas of the high-rate channels. The system also includes an adder 6 , which subtracts the interference replicas from the received signal via the array antenna elements. Further a resultant interference-eliminated signal is applied to receivers for the low-rate and high-rate channels.read more
Citations
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Patent
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TL;DR: In this paper, a voltage profile generation portion performs correlation computations of received signals for each antenna element and generates received signal voltage profiles; a phase difference estimation portion uses sample data from each voltage profile at the same time to perform correlation calculations among antenna elements and estimates the phase difference among antennas at the above time, and similarly estimates the phases of each antenna elements at each time.
Patent
Configurable terminal engine
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References
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Patent
System and method for optimizing spectral efficiency using time-frequency-code slicing
TL;DR: In this paper, the transmission medium is sliced into time and frequency domains so as to create time-frequency slices for assignment to users having varying access rates and user-application requirements.
Patent
Reception timing detection circuit of CDMA receiver and detection method
TL;DR: A reception timing detection circuit of a CDMA receiver comprises an A/D converter 101 for obtaining a digital reception signal S, a correlator 102 for obtaining the cross-correlation between S and a known signal series periodically within a predetermined delay.
Patent
Cdma demodulating apparatus
TL;DR: In this article, a CDMA demodulating scheme with an improved interference canceling effect was proposed, where a pilot signal of a known pattern is inserted between information signals from a plurality of communicators.
Patent
Method of and apparatus for interference rejection combining and downlink beamforming in a cellular radiocommunications system
TL;DR: In this article, interference rejection combining techniques have been proposed which can increase significantly the performance of the uplink in C/I limited environments, but their performance does not degrade as the correlation between the received signals increases.
Patent
CDMA receiver with antenna array adaptively controlled with combined errors of despread multipath components
TL;DR: In this article, a threshold decision is made on the sum of the demodulated signals to produce a decision output, and error detection circuitry multiplies the decision output by the estimated channel responses, and detects differences between the multiplied decision outputs and the despread signals, which are combined together.