RECEIVING APPARATUS AND METHOD, SENDING APPARATUS AND METHOD, FRONT-END CIRCUIT, MODULATOR, AND TRANSCEIVING SYSTEM

摘要

A receiving apparatus and method, a sending apparatus and method, a front-end circuit, a modulator, and a transceiving system are provided. The sending apparatus includes: a double-sideband OFDM modulator, configured to perform double-sideband OFDM modulation on a bit sequence of service data to obtain a double-sideband OFDM analog electrical signal, where the double-sideband OFDM analog electrical signal carries the service data on both positive and negative sidebands, and an IQMZ, configured to perform optical carrier modulation on the double-sideband OFDM analog electrical signal to obtain a double-sideband OFDM optical signal, where the double-sideband OFDM optical signal carries the service data on both positive and negative sidebands. In comparison with a traditional manner in which service data is only carried on a positive sideband, bandwidth utilization in the present invention doubles.

主权项

1. A sending apparatus, comprising:
a double-sideband orthogonal frequency division multiplexing (OFDM) modulator, configured to perform double-sideband OFDM modulation on a bit sequence of service data to obtain a double-sideband OFDM analog electrical signal, wherein the double-sideband OFDM analog electrical signal carries the service data on both positive and negative sidebands, the positive sideband comprises a plurality of subcarriers including a first subcarrier through an Nth subcarrier, the negative sideband comprises a plurality of subcarriers including an (N+1)th subcarrier through a 2Nth subcarrier, and N is an integer greater than 1; and an in-phase quadrature phase-shift keying Mach Zehnder (IQMZ) modulator, configured to perform optical carrier modulation on the double-sideband OFDM analog electrical signal, to obtain a double-sideband OFDM optical signal, wherein the double-sideband OFDM optical signal carries the service data on both positive and negative sidebands.