Patent ID: 9281980
Filing Date: 2016-03-08
CPC Classification: H04B,H04L

Claim Text:
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 N 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.