Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
355 words
A code division multiple access local area network system comprising: a repeater for generating a common synchronizing signal as a reference signal; means for sending and receiving signals, said means for sending and receiving including a sending line and a receiving line for receiving data, each of said lines having an end connected to said repeater; a plurality of subscriber units; and a corresponding plurality of transceivers connecting each of said subscriber units to said means for sending and receiving signals; each of said transceivers including a common synchronizing circuit, a transmitter and a receiver, said common synchronizing circuit comprising means for replicating and regenerating a code sequence equal to said reference signal by synchronizing the code sequence in response to the reference signal of a maximal-length code sequence; said transmitter comprising means for receiving said code sequence from said synchronizing circuit, means for delaying said code sequence according to a time determined by subtracting the entire time delay caused by said sending line and said receiving line from a delay time assigned to a specific receiver to which a signal is being sent, a level coder for converting data from said corresponding subscriber to M-ary data and providing an associated output signal, a multiplier connecting said level coder to said means for delaying said code sequence, for multiplying the delayed code from said means for delaying by said signal provided by said level coder to provide a multiplied signal, and an amplifier for amplifying said multiplied signal to provide an amplified signal, said transmitter transmitting said amplified signal to said sending line; said receiver comprising means for receiving said code sequence from said synchronizing circuit, means for delaying said code sequence according to a delay time corresponding to a specific number assigned to said receiver, means for receiving data, a correlator for providing a correlation value of said code sequence delayed at said receiver and the received data, a detector for detecting signals for the receiver in accordance with the correlation value, and an integrator for integrating the detected signals, whereby signals can be transmitted from each of said subscriber units simultaneously without interference.
Claim 2
Dependent Claim
355 words
A code division multiple access local area network system comprising: a repeater for generating a common synchronizing signal as a reference signal; means for sending and receiving signals, said means for sending and receiving including a sending line and a receiving line for receiving data, each of said lines having an end connected to said repeater; a plurality of subscriber units; and a corresponding plurality of transceivers connecting each of said subscriber units to said means for sending and receiving signals; each of said transceivers including a common synchronizing circuit, a transmitter and a receiver, said common synchronizing circuit comprising means for replicating and regenerating a code sequence equal to said reference signal by synchronizing the code sequence in response to the reference signal of a maximal-length code sequence; said transmitter comprising means for receiving said code sequence from said synchronizing circuit, means for delaying said code sequence according to a time determined by subtracting the entire time delay caused by said sending line and said receiving line from a delay time assigned to a specific receiver to which a signal is being sent, a level coder for converting data from said corresponding subscriber to M-ary data and providing an associated output signal, a multiplier connecting said level coder to said means for delaying said code sequence, for multiplying the delayed code from said means for delaying by said signal provided by said level coder to provide a multiplied signal, and an amplifier for amplifying said multiplied signal to provide an amplified signal, said transmitter transmitting said amplified signal to said sending line; said receiver comprising means for receiving said code sequence from said synchronizing circuit, means for delaying said code sequence according to a delay time corresponding to a specific number assigned to said receiver, means for receiving data, a correlator for providing a correlation value of said code sequence delayed at said receiver and the received data, a detector for detecting signals for the receiver in accordance with the correlation value, and an integrator for integrating the detected signals, whereby signals can be transmitted from each of said subscriber units simultaneously without interference.