Communication system including a wire network linked with another network via radio waves
First Claim
1. A terminal connected to a wire communication network for radio communication,wherein said terminal includes at least one of transmitter means and receiver means,wherein said transmitter means receives a first baseband signal in a particular format from said wire communication network, and modulates a carrier wave using the received first baseband signal into a transmission signal without translating the particular format of the first baseband signal into a different format,wherein the transmission signal is transmitted via a transmitting antenna,wherein said receiver means receives a signal via a receiving antenna, and demodulates the received signal into a second baseband signal,wherein the second baseband signal is transmitted from said receiver means to said wire communication network without translating a format of the second baseband signal into a different format,wherein said wire communication network includes an optical fiber link for transmitting a signal within said wire communication network,wherein the first baseband signal received by said transmitter is an optical signal, and wherein the second baseband signal transmitted from said receiver means is an optical signal,wherein said transmitter means includes a light controlled oscillator for generating the carrier wave of a predetermined nominal frequency,wherein the first baseband signal received by said transmitter means is applied to said light controlled oscillator, andwherein said light controlled oscillator generates, as the transmission signal, a signal of a frequency shifted from the predetermined nominal frequency according to an intensity of the applied first baseband signal.
2 Assignments
0 Petitions
Accused Products
Abstract
A vehicle-vehicle communication system includes an in-vehicle wire LAN established in a vehicle. The in-vehicle wire LAN includes a plurality of devices connected by optical fiber links. A terminal for radio vehicle-vehicle communication is connected to the in-vehicle wire LAN by the optical fiber link. The terminal receives an optical digital signal in a predetermined format from the in-vehicle wire LAN. The terminal includes a light controlled oscillator and applies the received optical signal to the light controlled oscillator. The light controlled oscillator outputs a transmission signal of a frequency shifted from a predetermined frequency according to the intensity of the applied optical signal. Thus the terminal generates the transmission signal using FSK-modulation technique without converting the format of the optical signal into another format. The transmission signal is transmitted to a device in another vehicle via radio waves.
29 Citations
13 Claims
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1. A terminal connected to a wire communication network for radio communication,
wherein said terminal includes at least one of transmitter means and receiver means, wherein said transmitter means receives a first baseband signal in a particular format from said wire communication network, and modulates a carrier wave using the received first baseband signal into a transmission signal without translating the particular format of the first baseband signal into a different format, wherein the transmission signal is transmitted via a transmitting antenna, wherein said receiver means receives a signal via a receiving antenna, and demodulates the received signal into a second baseband signal, wherein the second baseband signal is transmitted from said receiver means to said wire communication network without translating a format of the second baseband signal into a different format, wherein said wire communication network includes an optical fiber link for transmitting a signal within said wire communication network, wherein the first baseband signal received by said transmitter is an optical signal, and wherein the second baseband signal transmitted from said receiver means is an optical signal, wherein said transmitter means includes a light controlled oscillator for generating the carrier wave of a predetermined nominal frequency, wherein the first baseband signal received by said transmitter means is applied to said light controlled oscillator, and wherein said light controlled oscillator generates, as the transmission signal, a signal of a frequency shifted from the predetermined nominal frequency according to an intensity of the applied first baseband signal.
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2. A terminal connected to a wire communication network for radio communication,
wherein said terminal includes at least one of transmitter means and receiver means, wherein said transmitter means receives a first baseband signal in a particular format from said wire communication network, and modulates a carrier wave using the received first baseband signal into a transmission signal without translating the particular format of the first baseband signal into a different format, wherein the transmission signal is transmitted via a transmitting antenna, wherein said receiver means receives a signal via a receiving antenna, and demodulates the received signal into a second baseband signal, wherein the second baseband signal is transmitted from said receiver means to said wire communication network without translating a format of the second baseband signal into a different format, wherein said wire communication network includes an optcal fiber link for transmitting a signal within said wire communication network, wherein the first baseband signal received by said transmitter is an optical signal, and wherein the second baseband signal transmitted from said receiver means is an optical signal, wherein said transmitter means includes a voltage controlled oscillator for generating the carrier wave of a predetermined nominal frequency and an optical/electrical converter, wherein the first baseband signal received by said transmitter means is applied to said optical/electrical converter, wherein said optical/electrical converter generates an electrical signal of a voltage variable with an intensity of the applied first baseband signal, and wherein said voltage controlled oscillator receives the electrical signal and generates, as the transmission signal, a signal of a frequency shifted from the predetermined nominal frequency according to the voltage level of the received electrical signal.
Specification