Patent ID: 8064544

Claim:
A device for receiving an orthogonal polarized frequency division multiplexed-differential quadrature phase shift keying (OPFDM-DQPSK) signal, comprising: a power splitter, adapted to split the OPFDM-DQPSK signal into a Signal- 1 and a Signal- 2 having the same power; a polarization beam splitter (PBS), adapted to split the Signal- 1 into an A(t) signal and a B(t) signal having polarization states orthogonal to each other; a demultiplexer (Demux), adapted to demultiplex the Signal- 2 to obtain a C(t) signal and a D(t) signal; a first delayer, adapted to delay the C(t) signal for a time of one code element T to obtain a C(t-T) signal; a second delayer, adapted to delay the D(t) signal for a time of one code element T to obtain a D(t-T) signal; a first frequency-mixing receiving module, adapted to perform frequency-mixing receiving on the A(t) signal and the C(t-T) signal to obtain a first electrical signal and a second electrical signal; a second frequency-mixing receiving module, adapted to perform frequency-mixing receiving on the B(t) signal and the D(t-T) signal to obtain a third electrical signal and a fourth electrical signal; and a decision recovery module, adapted to recover four logical sequences by performing decision on the first electrical signal, the second electrical signal, the third electrical signal, and the fourth electrical signal respectively.