Multi-antenna impulse uwb receiver
AssigneeCommissariat A L'energie Atomique Et Aux Energies Alternatives
InventorsTien-Tu VO, Frederic HAMEAU, Laurent OUVRY, Venceslass RAT
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Abstract
The present invention relates to an impulse UWB signal multi-antenna receiver wherein an RF front-end (330) is shared between the various antennae (3101, . . . , 310M). The receiver comprises a code multiplexing stage (320) upstream of the RF front-end, and a code demultiplexing stage (340) downstream of this front-end. The codes used for multiplexing and demultiplexing are orthogonal codes with timing a sub-multiple of the chip timing of the code used at transmission for modulation of the impulse UWB signal.
Claims10
An impulse UWB receiver comprising:
- a plurality M of antennas, where each antenna of the receiver receives an antenna signal, where said antenna signal is an impulse UWB signal formed from successive pulses modulated using a transmission code at a chip frequency, fPRP, where an information symbol is encoded over Nc successive pulses, where Nc is the length of the transmission code:
- a multiplexing stage configured to multiplex, the antenna signals using orthogonal codes in order to provide a multiplexed signal, where each orthogonal code is associated with a distinct antenna, the chip frequency of said orthogonal codes being equal to a sub-multiple fPRP/P of the chip frequency of the transmission code where P<N, is an integer divider of Nc;
- a RF front-end which receives said multiplexed signal;
- and
- a demultiplexing stage configured to demultiplex the signal at the output from the RF front-end using said orthogonal codes, said demultiplexing stage supplying M demultiplexed signals corresponding to the various antennas.
Dependencies are inferred from the claim text.