Patent ID: 9503297
Filing Date: 2016-11-22
CPC Classification: H04L

Claim Text:
1. A transmitter for transmitting data to a receiver using Orthogonal Frequency Division Multiplexed (OFDM) symbols, the OFDM symbols including a plurality of sub-carrier symbols, some of the sub-carrier symbols carrying data symbols and some of the sub-carrier signals carrying pilot symbols, the transmitter comprising: circuitry configured to wherein the pilot sub-carriers for the OFDM symbols are formed from continuous pilots in which pilot symbols are transmitted on the same sub-carriers of the OFDM symbols and scattered pilots in which pilot symbols are transmitted on sub-carriers at different locations in the OFDM symbols and, for each of 8K, 16K or 32K modes, a pattern of the scattered pilots P for each guard interval fraction, having a displacement in frequency between sub-carriers which are used to carry a pilot symbol between successive OFDM symbols, Dx, and a displacement Dy between successive OFDM symbols carrying one or more pilot symbols on the same subcarrier, for the respective guard interval fraction added from the set, are: