Patent ID: 8520748
Filing Date: 2013-08-27
Classification: H04J,H04L

Abstract:
1. A transmitter in a cellular system using an OFDM scheme, the transmitter comprising: a multiplication unit which multiplies a subcarrier for channel estimation by a code; and a transmission unit which performs transmission based on said multiplication, wherein the code is such that a phase difference φ between codes multiplied with consecutive subcarriers for channel estimation is constant, and codes of every M consecutive subcarriers, M being 2 or an integer greater than 2, are mutually orthogonal with codes multiplied with same subcarriers of another transmitter, φ satisfies φ≧2×G×π, G being a guard interval length when an effective OFDM symbol length is 1, and M is a submultiple of the total number of subcarriers Nsub.