Patent ID: 7991100
Filing Date: 2011-08-02
Classification: H04B

Abstract:
1. A method of synchronizing a radio receiver suitable for receiving coded symbols in the form of radio pulses, each transmitted in a predetermined time slot within a respective frame, said slot being determined by a value selected from a set of ordered values forming a code stored in the receiver, the method comprising the following steps, performed within the receiver: a—detecting received pulses; b—storing moments of reception of said pulses; c—associating a first value selected from the code with a first received pulse; d—selecting a second value from the code; e—estimating at least one moment of reception by combining the moment of reception stored for said first received pulse with said first and second selected code values; f—if the estimated moment matches the moment of reception stored for a second received pulse, validating the associations of said first and second code values with said first and second received pulses, g—deducing, from at least one of the values of the code whose selection has been validated, a moment of transmission start for a symbol, wherein, in step f, the moment of reception estimated for a second received pulse matches the moment of reception stored for said second received pulse if an absolute value of a difference between the estimated and stored moments of reception for the second received pulse is less than a predetermined fraction of the duration of a time slot.