Pulse modulation type transmitter apparatus and pulse modulation type receiver apparatus
View Patent ↗A pulse modulation type transmitter apparatus and a pulse modulation type receiver apparatus wherein both a fast synchronization establishment and a low power consumption of a synchronizing part can be achieved at the same time and wherein the data transmission/reception can be performed soon after a commencement of communication, and further a fast data transmission and a low power consumption can be achieved. A first template signal ( 1006 ), which is generated based on a separately transmitted RF frame synchronization signal ( 1005 ), is used to generate a frame synchronization signal ( 1009 ), and a second frame synchronization timing adjusting part ( 150 ) is used to synchronize the frame synchronization signal ( 1009 ) with a received RF data signal ( 1004 ). Then, a synchronization detection is performed, whereby a prompt pulse acquisition and a prompt pulse phase acquisition can be achieved. After the establishment of frame synchronization, a template switching part ( 142 ) is used to switch from the first template signal ( 1006 ) to a second template signal ( 1007 ) that has been already synchronized with the first template signal ( 1006 ). Then, a synchronization detection is performed, whereby the frame synchronization can be maintained.
1. A pulse modulation type transmitting apparatus comprising:
a symbolization section that executes predetermined symbolization for transmit data, a frame synchronization signal, and a symbol synchronization timing signal, and generates symbolized transmit data, a symbolized frame synchronization signal, and a symbolized symbol synchronization timing signal;
an RF data signal transmitting section that executes predetermined modulation on said symbolized transmit data, performs up-conversion to radio frequency, and generates an RF data signal having a first RF input signal that is input to a frame synchronization section of a communicating party; and
an RF synchronization signal transmitting section that executes predetermined modulation on said symbolized frame synchronization signal, performs up-conversion to radio frequency, and generates an RF frame synchronization signal having a second RF input signal that is input to a frame synchronization section of a communicating party, and executes predetermined modulation on said symbolized symbol synchronization timing signal, performs up-conversion to radio frequency, and generates an RF symbol synchronization timing signal that is input to a symbol synchronization section of a communicating party.
2. The pulse modulation type transmitting apparatus according to claim 1 , wherein said RF synchronization signal transmitting section sends said RF symbol synchronization timing signal in a different frequency band from said RF frame synchronization signal.
3. The pulse modulation type transmitting apparatus according to claim 1 , wherein said RF synchronization signal transmitting section sends said RF frame synchronization maintenance signal and said RF symbol synchronization timing maintenance signal at a previously defined time interval.
4. The pulse modulation type transmitting apparatus according to claim 1 , wherein said RF data signal transmitting section and said RF synchronization signal transmitting section further comprise a waveform selection section that assigns wavelets having mutually separable signal waveforms to said RF data signal, said RF frame synchronization signal, said RF symbol synchronization timing signal, said RF frame synchronization maintenance signal, and said RF symbol synchronization timing maintenance signal.
5. The pulse modulation type transmitting apparatus according to claim 1 , wherein said waveform selection section uses different wavelets for one or more signals among said RF frame synchronization signal, said RF symbol synchronization timing signal, said RF frame synchronization maintenance signal, and said RF symbol synchronization timing maintenance signal.
6. The pulse modulation type transmitting apparatus according to claim 1 , wherein said RF frame synchronization signal includes data for device authentication.
7. The pulse modulation type transmitting apparatus according to claim 1 , wherein data rates of at least two of said RF data signal, said RF frame synchronization signal, and said RF symbol synchronization timing signal differ.
8. The pulse modulation type transmitting apparatus according to claim 1 , wherein said RF data signal transmitting section and said RF synchronization signal transmitting section transmit at least one of said RF data signal, said RF frame synchronization signal, and said RF symbol synchronization timing signal.