PILOT TRANSMISSION AND CHANNEL ESTIMATION FOR A COMMUNICATION SYSTEM UTILIZING FREQUENCY DIVISION MULTIPLEXING

In a wireless communication system, an apparatus is adapted to inter alia receive, from a user equipment, at least one single-carrier frequency division multiple access, SC-FDMA, symbol transmitted on the frequency resources assigned to the user equipment and comprising one or more pilot symbols generated based on a polyphase sequence, to remove a cyclic prefix in each of the at least one SC-FDMA symbol, and to demodulate the at least one SC-FDMA symbol to obtain received pilot symbols. Another apparatus is adapted to inter alia generate at least one single-carrier frequency division multiple access (SC-FDMA) symbol comprising the sequence of pilot symbols, and to transmit the at least one SC-FDMA symbol using frequency resources assigned to the apparatus.