Pilot Scheme for a MIMO Communication System

A mobile terminal, comprising:

• receive circuitry configured to receive an assignment of a plurality of subcarriers in one or more blocks of subcarriers for the SC-FDM signal, wherein the assignment of the plurality of subcarriers is:
• every other subcarrier of the one or more blocks of subcarriers on the one or more pilot symbols in the TTI;
• and
• every subcarrier of the one or more blocks of subcarriers on the plurality of traffic symbols in the TTI;
• wherein each block of the one or more blocks of subcarriers comprises more than one subcarrier;
• demodulation pilot generation circuitry configured to generate demodulation pilot information, wherein the demodulation pilot information is usable by a receiver in demodulating traffic information from the SC-FDM signal;
• subcarrier mapping circuitry configured to:
• map the demodulation pilot information to every other subcarrier of the one or more blocks of subcarriers on the one or more pilot symbols in the TTI;
• map the traffic information onto every subcarrier of the one or more blocks of subcarriers on the plurality of traffic symbols in the TTI, wherein each of the plurality of traffic symbols of the SC-FDM signal undergoes discrete Fourier transform pre-processing of the traffic information prior to sub-carrier mapping, and wherein each of the at least one pilot symbols of the SC-FDM signal does not undergo discrete Fourier transform pre-processing prior to sub-carrier mapping;
• wherein a second mobile terminal is configured to be mapped:
• to the assignment of the plurality of subcarriers for the mobile terminal on the traffic symbols of the TTI;
• and
• to subcarriers different from the assignment of the plurality of subcarriers for the mobile terminal on the pilot symbols of the TTI;
• and
• transmit circuitry configured to transmit the demodulation pilot information on the one or more pilot symbols and the traffic information on the plurality of traffic symbols.

A method of transmitting demodulation pilot information, the method comprising:

• a base station performing,
• transmitting an assignment of a plurality of subcarriers in one or more blocks of subcarriers for the SC-FDM signal, wherein the assignment of the plurality of subcarriers is:
• every other subcarrier of the one or more blocks of subcarriers on the one or more pilot symbols in the TTI;
• and
• every subcarrier of the one or more blocks of subcarriers on the plurality of traffic symbols in the TTI;
• wherein each block of the one or more blocks of subcarriers comprises more than one subcarrier;
• and
• receiving, from the mobile terminal, demodulation pilot information on the one or more pilot symbols and traffic information on the plurality of traffic symbols;
• wherein the demodulation pilot information is mapped to every other subcarrier of the one or more blocks of subcarriers on the one or more pilot symbols in the TTI;
• wherein the traffic information is mapped onto every subcarrier of the one or more blocks of subcarriers on the plurality of traffic symbols in the TTI, wherein each of the plurality of traffic symbols of the SC-FDM signal undergoes discrete Fourier transform pre-processing of the traffic information prior to sub-carrier mapping, and wherein each of the at least one pilot symbols of the SC-FDM signal does not undergo discrete Fourier transform pre-processing prior to sub-carrier mapping;
• wherein a second mobile terminal is configured to be mapped:
• to the assignment of the plurality of subcarriers for the mobile terminal on the traffic symbols of the TTI;
• and
• to subcarriers different from the assignment of the plurality of subcarriers for the mobile terminal on the pilot symbols of the TTI.