The common optical coherent receivers cannot receive the high-speed m ulti-band non-guard interval optical orthogonal frequency divisio n multiplexing (NGI-OOFDM) signals for bandwidth limitation,while the proposed asymmetrical transmitter and receiver architecture can achieve it without any addtional optical signal-t o-noise ratio (OSNR) penalty.In th e asymmetrical transmitter and receiver architecture,a single laser source is utilized to generate frequency c omb source as the optical sub-carriers of the proposed NGI-OOFDM system with frequency spacing of 28GHz by differenti al Mach-Zehnder external modulator.Each of the 8carriers of the comb source is encoded with 112Gbit/s p olarization division multiplexed quadrature phase shift keying (PDM-QPSK).At the receiver,an array consisting of 4common optical intradyne coherent receivers is employed to receive the high- speed signal,each intradyne coherent receiver can receive 2subcarriers of the OOFDM signal.In this work,the back-to-back simulation results show that the OSNR penalty of the proposed scheme is about 9dB compared with 112Gbit/s intradyne coherent PDM-QPSK singl e carrier system at BER of 10－3. For 16,0ps/nm chromatic dispersion (CD) and electrical CD compensation,the OS NR penalty of the proposed scheme is about 0.2dB.13×80km fiber link transmission is also conducted,and t he OSNR penalty is about 1.5dB with the electrical CD compensation compared with the back-to-back simulation resul t.