Patent ID: 8184681
Filing Date: 2012-05-22
Classification: H04B,H04L,H04W

Abstract:
1. An apparatus for faithful frequency shifting of a first spread-spectrum signal without any protocol conversion from a first frequency band to a second frequency band distinct from the first frequency band, said apparatus comprising: a first port for receiving the first spread-spectrum signal in the first frequency band; a first I/Q demodulator coupled to said first port to receive the first spread-spectrum signal from said first port, for deriving the I and Q component signals of the first spread spectrum signal; a first I/Q modulator coupled to said first I/Q demodulator to receive the first spread spectrum signal I and Q component signals, said first I/Q modulator being operative to reconstruct first spread-spectrum signal and to frequency shift the first spread-spectrum signal to the second frequency band; and a second port coupled to said first I/Q modulator to receive the frequency shifted signal from said first I/Q modulator, for outputting the frequency shifted first spread spectrum signal in the second frequency band said apparatus further operative for faithful frequency shifting of a second spread-spectrum signal without any protocol conversion from the second frequency band to the first distinct frequency band, said apparatus further comprising: a third port for receiving the second spread-spectrum signal in the second frequency band; a second I/Q demodulator coupled to said third port to receive the second spread-spectrum signal from said third port, for deriving the I and Q component signals of the second spread-spectrum signal; a second I/Q modulator coupled to said second I/Q demodulator to receive the second spread spectrum signal I and Q component signals, said second I/Q demodulator being operative to reconstruct the second spread-spectrum signal frequency shifted to the first frequency band; and a fourth port coupled to said second I/Q modulator to receive the frequency shifted signal from said second I/Q modulator, for outputting the frequency shifted second spread-spectrum signal in the first frequency band said apparatus further operative to be in a selected one of distinct first and second states, wherein in the first state a signal is received at said first port and output frequency shifted at said second port, and wherein in the second state a signal is received at said third port and output frequency shifted at said fourth port.