Patent ID: 7852318

Claim:
A position detection system for use in association with computing applications, said position detection system comprising: at least one positional element for attaining a position, said positional element comprising: at least one first emitter for emitting a substantially continuously modulated acoustic waveform decodable to fix said position, and a second emitter for emitting a synchronization signal; a positioning device operative to determine a position of said positional element, said positioning device comprising: an arrangement of at least one of a first detector operative to detect said continuously modulated acoustic waveform in a manner permitting fixing of said position and outputting said waveform for computation, in a manner retentive of said position fixing ability; and a second detector operative to detect said synchronization signal; said synchronization signal being transmitted within a time frame having a fixed duration and being continuously repeated, said time frame being known to said positioning device, said synchronization signal being a sequence of at least two synchronization sub-signals, each synchronization sub-signal bearing timing data for said continuously modulated acoustic waveform, thereby to improve accuracy of said fixing of said position, said at least two synchronization sub-signals allow said positioning device to derive clock synchronization data by correlating said timing data and said known time frame duration.