Method of acquiring initial synchronization in impulse wireless communication and receiver
AssigneePanasonic Corporation
InventorsYew Soo Eng, Zhan Yu
Life of this patent
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Abstract
A receiver in an impulse wireless communication. The receiver (300) includes a pulse-pair correlator (304) that receives a signal (316) and divides it into two signals for paths. One of the signals is input to signal multiplier (312) while another signal is delayed by a delay unit (310). The signal multiplier (312) multiplies the received signal (316) by a delayed signal (318). An integrator (314) integrates an output signal (322) over a designated period of time. An adding module (306) sums an output signal (324) from the integrator (314). An acquiring module (308) compares an summing-up output (326) from the adding module (306) with a predetermined threshold value to detect the existence of a transmitting-standard preamble.
Claims3
A method of acquiring initial synchronization in impulse radio communication, the method comprising:
- at a transmitting apparatus:
- transmitting a transmitted reference preamble to a receiving apparatus, the transmitted reference preamble being formed with a plurality of identically shaped pulse pairs that are spaced by a predetermined time separation D, each identically shaped pulse pair being separated from neighboring identically shaped pulse pairs at equal pulse pair intervals;
- and
- transmitting a transmission data packet to the receiving apparatus after having transmitted the transmitted reference preamble to the receiving apparatus;
- and
- at the receiving apparatus:
- multiplying the transmitted reference preamble and a signal obtained by delaying the transmitted reference preamble by the predetermined time separation D, integrating a result of the multiplication per integration time that is equal to the pulse pair interval, detecting the transmitted-reference preamble based on a result of the integration, and generating a time mark;
- and
- starting to receive the transmission data packet using the generated time mark at the receiving apparatus.
A receiving apparatus comprising:
- a receiving antenna that receives a transmitted-reference preamble formed with a plurality of identically shaped pulse pairs that are spaced by a predetermined time separation D, each identically shaped pulse pair being separated from neighboring identically shaped pulse pairs at equal pulse pair intervals;
- a delay circuit that delays the transmitted-reference preamble received by the receiving antenna by the predetermined time separation D;
- a multiplier that multiplies the transmitted-reference preamble received by the receiving antenna by the transmitted-reference preamble delayed by the delay circuit;
- an integrator that integrates an output of the multiplier per integration time that is equal to the pulse pair interval;
- a summing module that adds outputs of the integrator;
- and
- an acquisition module that detects the transmitted-reference preamble by comparing an output of the summing module to a predetermined threshold, and generates a time mark.
Dependencies are inferred from the claim text.