RF signal processing in multi-antenna systems
First Claim
1. A method for processing RF signals in a multi-antenna systems, comprising:
- generating Lt input data streams in a transmitter;
modulating the Lt weighted input data streams to RF signals;
switching the RF signals to t≧
Lt RF branches;
applying a phase-shift transformation to the RF signals by a t×
t matrix multiplication operator Φ
1, whose output are t RF signals;
transmitting the t RF signals over a channel by t transmit antennas;
receiving the transmitted signals by r antennas in a receiver;
applying a phase-shift transformation to the r RF signals by a r×
r matrix multiplication operator Φ
2;
selecting Lr branches from the r streams;
demodulated the Lr signal streams; and
processing in baseband to recover output data streams corresponding to the input data streams.
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Accused Products
Abstract
A method for antenna subset selection by joint processing in RF and baseband in a multi-antenna systems. Lt input data streams are generated in a transmitter for either diversity transmission or multiplexing transmission. These streams are modulated to RF signals. These signals are switched to the t branches associated with the t transmit antennas, and a phase-shift transformation is applied to the RF signals by a t×t matrix multiplication operator Φ1, whose output are t≧Lt RF signals. These signals are transmitted over a channel by t antennas. The transmitted signals are received by r antennas in a receiver. A phase-shift transformation is applied to the r RF signals by a r×r matrix multiplication operator Φ2. Lr branches of these phase shifted streams are demodulated and further processed in baseband to recover the input data streams.
43 Citations
15 Claims
-
1. A method for processing RF signals in a multi-antenna systems, comprising:
-
generating Lt input data streams in a transmitter;
modulating the Lt weighted input data streams to RF signals;
switching the RF signals to t≧
Lt RF branches;
applying a phase-shift transformation to the RF signals by a t×
t matrix multiplication operator Φ
1, whose output are t RF signals;
transmitting the t RF signals over a channel by t transmit antennas;
receiving the transmitted signals by r antennas in a receiver;
applying a phase-shift transformation to the r RF signals by a r×
r matrix multiplication operator Φ
2;
selecting Lr branches from the r streams;
demodulated the Lr signal streams; and
processing in baseband to recover output data streams corresponding to the input data streams. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification