System and method for transmtting and receiving signal with quasi-periodic pulse sequence

摘要

System and method are disclosed for synchronization of a transmitting device and a receiving device that communicate with each other via pulse modulation. The synchronization technique entails the transmitting device sending one or more quasi-periodic pulse sequences to the receiving device. A quasi-periodic pulse sequence is based on a substantially periodic pulse sequence, and may include some non-periodic pulses or not include some periodic pulses. The transmitting device may transmit frames each including a preamble that comprises one or more quasi-periodic pulse sequences, and a data payload that may comprise data. The receiving device receives the signal, generates samples of the signal, and detects the quasi-periodic pulse sequences in the received signal by analyzing samples based on a sample associated with a pulse and the period associated with the substantially periodic pulse sequence. The receiving device is further able to detect frames based on the detection of the sequence, and extract data therefrom.

主权项

1. A method of transmitting a signal, comprising: generating a quasi-periodic pulse sequence based on a substantially periodic pulse sequence, wherein the quasi-periodic pulse sequence is based on pulses of the substantially periodic pulse sequence that occur once within respective defined periodic time intervals, and wherein the defined periodic time intervals include an interval period different than a pulse period of the substantially periodic pulse sequence; and transmitting the signal comprising the quasi-periodic pulse sequence, wherein generating the quasi-periodic pulse sequence comprises: for each time interval of the defined periodic time intervals, performing the following: determining a number of pulses of the substantially periodic pulse sequence that fall within the time interval; in response to determining that only one pulse falling within the time interval, including the one pulse as part of the quasi-periodic pulse sequence; in response to determining that two or more pulses fall within the time interval, including only one of the two or more pulses as part of the quasi-periodic pulse sequence, and discarding the remaining one or more pulses; and in response to determining that no pulses fall within the time interval, adding a dummy pulse to the time interval and including the dummy pulse as part of the quasi-periodic pulse sequence.