摘要:
There is disclosed a method, and circuit to implement the method, of estimating the timing position of a received signal in a mobile communications system. The method includes the steps of: correlating the received signal with an expected sequence; determining the m successive correlation results having the highest correlation; determining the n successive correlations of the m correlations having the highest correlation, where n
摘要:
A wireless telecommunications network comprises a first terminal (2) and a second terminal (UE), the second terminal including a receiving stage and a processor (10) operative to process signals received from the first terminal and to determine received signal quality. The second terminal also includes a transmitter (Tx) operative to send a feedback signal (QI, RAI) dependent upon the received signal quality to the first terminal provided the change in received signal quality is determined as being more than a predetermined amount.
摘要:
A method for determining the speed of a mobile user, comprising deriving first signals related to the phase variations of a number of taps of an equivalent channel input response at the input of a channel equalizer in a base station receiver which receives the signal,
deriving second signals related to the carrier frequency offset of the signal received in the base station receiver; subtracting the second signals from the first signals; and deriving from the difference a quantity related to the Doppler frequency shift of the received signals, and therefore to the speed of the mobile.
摘要:
Apparatus and method for iteratively decoding a signal are provided. The apparatus includes a central pool of resources for iteratively decoding signals. The central pool may run a plurality of iterative decoding processes, each process being allocated to a signal processing unit upon request and depending upon resource availability.
摘要:
A mobile telephone system includes a base station which establishes a link with a selected mobile station. The received signal from the mobile station will include a noise component as well as a possible interference component from another mobile station operating at the same frequency in another cell. The base station has a trellis based equalisation system which operates on the assumption that the received signal includes components which have a predominantly Gaussian characteristic. A switch controller determines when the interference component (which is non-gaussian) in the received signal becomes a dominant component and operates to switch a spatio-temporal filter into the circuit instead of the trellis based equalisation system, to improve the bit error rate performance.