Method of performing code synchronization, and receiver
AssigneeNokia Corporation
InventorsMarcos Katz, Savo Glisic, Jari Iinatti
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Abstract
The invention relates to a method of performing code acquisition on a signal to be received and to a receiver implementing the method. In the method the receiver receives a signal from a transmitter by at least two antenna beams, and to perform code acquisition, the antenna beams formed are searched at different delays of the spreading code. The number M of antenna beams can also be changed adaptively by determining a signal-to-noise ratio and by forming a number of antenna beams which is proportional to the signal-to-noise ratio. The receiver performs code acquisition by receiving a signal from the transmitter and by searching the antenna beams formed at the different delays of the spreading code.
Claims24
A method of performing code acquisition on a signal to be received, which is spread-coded with a pseudorandom spreading code, the method comprising
- forming a signal-to-noise ratio estimate from the ratio of the level of the signal to be received to the level of interferences,
- forming a number of angular cells which is proportional to the signal-to-noise ratio estimate, and receiving a signal;
- and
- performing code acquisition by searching the angular cells formed at different delays of the spreading code.
A method of performing code acquisition on a signal to be received, which is spread-coded with a pseudorandom spreading code, the method comprising receiving a signal with at least two angular cells,
- performing code acquisition by searching the angular cells at the delays of the spreading code.
A receiver which is arranged to perform code acquisition on a signal to be received, which is spread-coded with a pseudorandom spreading code, the receiver comprising signal-to-noise ratio estimation means for determining a signal-to-noise ratio estimate from the ratio of the level of the signal to be received to the level of interferences, wherein the receiver being arranged to
- form a number of angular cells which is proportional to the signal-to-noise ratio and receive a signal;
- and
- perform code acquisition by searching the angular cells formed at different delays of the spreading code.
A receiver for performing code acquisition on a signal to be received, which is spread-coded with a pseudorandom spreading code, the receiver being arranged to receive a signal by at least two angular cells, wherein the receiver is arranged to perform code acquisition by searching the angular cells at different delays of the spreading code.
Dependencies are inferred from the claim text.