Method and device for selecting an antenna for receipt of a multi-carrier signal
First Claim
Patent Images
1. Method of evaluating received signals for a device comprising:
- receiving a signal modulated simultaneously over a plurality of carriers, each carrier transporting a sequence of symbols, all the symbols transmitted simultaneously over all the carriers forming a series of symbols, separately evaluating the signal received by both a first antenna and a second antenna along a common evaluation path, the evaluation for the signal received at each of the first and second antennas being carried out for at least one evaluation period, wherein, for the evaluation period;
a confidence indicator is determined for the signal corresponding to each carrier and to each symbol received,the symbols received are then transformed into a bitstream to which a stream of confidence indicators is allocated, each confidence indicator being allocated to a bit of a received symbol, the stream of confidence indicators being ordered identical to the bitstream,sliding averages are then determined, the sliding averages being obtained from a number of confidence indicators from said stream of confidence indicators, this number being less than the total number of bits which can be transmitted simultaneously over the plurality of carriers, andselecting one of the first and second antennas according to the separate evaluation for the signal received at each of the first and second antennas.
3 Assignments
0 Petitions
Accused Products
Abstract
A method and device for evaluating a received signa1 in a data-receiving system using multi-carrier modulation are provided. A confidence indicator is determined for each data item received so as to provide a stream of confidence indicators parallel to the datastream received. The confidence indicators are ordered identical to the data received. A device for evaluating a confidence indicator for each carrier and a device for laying out a stream of confidence indicators identical to a datastream received are provided.
12 Citations
10 Claims
-
1. Method of evaluating received signals for a device comprising:
-
receiving a signal modulated simultaneously over a plurality of carriers, each carrier transporting a sequence of symbols, all the symbols transmitted simultaneously over all the carriers forming a series of symbols, separately evaluating the signal received by both a first antenna and a second antenna along a common evaluation path, the evaluation for the signal received at each of the first and second antennas being carried out for at least one evaluation period, wherein, for the evaluation period; a confidence indicator is determined for the signal corresponding to each carrier and to each symbol received, the symbols received are then transformed into a bitstream to which a stream of confidence indicators is allocated, each confidence indicator being allocated to a bit of a received symbol, the stream of confidence indicators being ordered identical to the bitstream, sliding averages are then determined, the sliding averages being obtained from a number of confidence indicators from said stream of confidence indicators, this number being less than the total number of bits which can be transmitted simultaneously over the plurality of carriers, and selecting one of the first and second antennas according to the separate evaluation for the signal received at each of the first and second antennas. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. Device for receiving a signal modulated over a plurality of carriers, each carrier transporting a sequence of symbols, all the symbols received simultaneously on the plurality of carriers forming a series of symbols, the device comprising:
-
a first antenna for receiving the signal; a second antenna for receiving the signal; an evaluation path; a switch for selectively connecting the first and second antennas to the evaluation path; the evaluation path comprising; demodulation means for demodulating the symbols received by the various carriers; transcoding means for transforming the series of symbols received into a bitstream received; at least one means for determining a confidence indicator associated with each symbol for each carrier during the demodulation; at least one layout means for transforming the confidence indicators determined for each cater into a stream of confidence indicators ordered identical to the bitstream, such that each confidence indicator is associated with a bit; and means for determining a sliding average obtained from a number of confidence indicators from said stream of confidence indicators, this number being less than the total number of bits which can be transmitted simultaneously over the plurality of carriers; the switch being controlled to select one of the first and second antennas according to a separate evaluation of the signal received at each of the first and second antennas. - View Dependent Claims (9, 10)
-
Specification