BACKGROUND In accordance with increase in data traffic, a high-capacity trunk light
communication network has been demanded, and high-speed communication of 40Gbps …

To enable signal position detection, frequency offset compen sation, clock offset
compensation, and chromatic dispersion amount estimation in a communication system …

2. Background Art There is a need for high peak to average power ratio (PAPR) mitigation
techniques in high speed data networks, including, but not limited to, wired, wireless …

6, 195,534 B1 2, 2001 Sakoda et al. CO-OFDM transmission over 2100 km DSF, Electonics
Letters, vol. 6,563,881 B1 5, 2003 Sakoda et al. 44, Nov. 20, 2008, pp. 1417-1418 …

the disclosure includes a first optical transceiver node comprising: a laser configured to emit
an input optical signal; a first splitter coupled to the laser and configured to split the input …

An optical receiver includes a two-stage constant modulus algorithm (CMA) equalizer. The
first stage is a modified version of a CMA equalizer and the second stage is a conven tional …

An optical transmission apparatus includes: a coherent detector configured to receive light
including different polarization components from an optical transmission path, and perform …

An optical transmitter transmits optical signal including a first signal and a second signal.
The second signal is subjected to change in a polarization state relative to a polarization …

Described herein are systems and methods for accurately estimating and removing a carrier
frequency offset. One exemplary embodiment relates to a system comprising a frequency …

In order to appropriately demultiplex the polarization multiplexed BPSK signal without using
a training sequence and decreasing the resistance to a frequency offset, an optical receiver …