Leap second and daylight saving time correction for use in a radio controlled clock receiver

A radio receiver method, said method comprising:nreceiving a phase modulated (PM), pulse width modulated (PWM)/amplitude shift keyed (ASK) broadcast signal encoded with phase-modulated time information frames;extracting said time information frames from the phase of said received signal; andwherein each said time information frame includes a synchronization sequence field, and one or more fields adapted to communicate a schedule for a next daylight-saving time transition, said schedule indicating the specific day for said transition.

A radio receiver method, said method comprising:nreceiving a phase modulated (PM), pulse width modulated (PWM)/amplitude shift keyed (ASK) broadcast signal encoded with phase-modulated time information frames;extracting said time information frames from the phase of the carrier of said modulated received signal, wherein each said time information frame includes a synchronization sequence field, a daylight-saving time hour information field and a daylight-saving time day information field, said daylight-saving time hour information and said daylight-saving time day information comprising a multi-bit field encoded using a nonlinear error correction code; andutilizing a lookup table, constructed a priori and stored in said receiver, to decode said multi-bit field to yield decoded daylight-saving time hour information and daylight-saving time day information.

A radio receiver, comprising:na receiver circuit operative to receive a phase modulated (PM), pulse width modulation (PWM)/amplitude shift keyed (ASK), broadcast signal encoded with phase-modulated time information frames;a frame extractor operative to extract said time information frames from the phase of the carrier of said received signal, wherein each said time information frame includes a synchronization sequence field, daylight saving time (DST) hour information and DST day information, said DST hour information and said DST day information comprising a multi-bit field encoded using a nonlinear error correction code; anda lookup table constructed a priori and stored in said radio receiver, said lookup table used to extract and decode said multi-bit field to yield decoded DST hour and day information.

A time-keeping device, comprising:na receiver circuit operative to receive a phase modulated (PM), pulse width modulation (PWM)/amplitude shift keyed (ASK), broadcast signal encoded with phase-modulated time information frames;a frame extractor operative to extract said time information frames from the phase of the carrier of said received signal, wherein each said time information frame includes a synchronization sequence field, daylight saving time (DST) schedule information including DST hour information and DST day information, said DST hour information and said DST day information comprising a multi-bit field encoded using a nonlinear error correction code;a lookup table constructed a priori and stored in said radio receiver, said lookup table used to extract and decode said multi-bit field to yield decoded DST hour and day information;a time correction module operative to correct the time indicated by said device by one hour forward at the instance represented by said daylight saving time (DST) schedule field while DST is not in effect, and wherein the time indicated by said device is corrected by one hour backwards when DST is in effect, said one hour correction preformed based on said DST schedule being received any time before the transition is to occur.