Patent ID: 7668199

Claim:
A system, comprising: one or more devices configurable to communicate according to a first protocol that permits interpretation of transmitted data field symbols associated with a first time duration; and one or more devices configurable to communicate according to a second protocol that permits interpretation of transmitted data field symbols associated with multiple time durations; wherein the one or more devices configurable to communicate according to the second protocol are operable to communicate using transmitted data field symbols associated with the first time duration and to communicate using transmitted data field symbols associated with a time duration that is not supported by the one or more devices configured to communicate according to the first protocol; the one or more devices configurable to communicate according to the second protocol transmit a first part of a data packet using transmitted symbols associated with a first guard interval duration and a second part of a data packet using transmitted symbols associated with a guard interval duration that is shorter than the first guard interval duration; the one or more devices configurable to communicate according to the second protocol each comprise offset adjust logic that is configured to detect a phase offset between subsequent transmitted symbols; the offset adjust logic is configured to adjust a phase offset per transmitted symbol value when subsequent transmitted symbols are associated with different guard interval durations.