SENDING INFORMATION AT A BAND EDGE WITHIN AN ORTHOGONAL FREQUENCY-DIVISION MULTIPLEXING (OFDM) SYMBOL

摘要

Technology is discussed for increasing the spectral efficiency of an Orthogonal Frequency-Division Multiplexing (OFDM) symbol. Spectral efficiency can be increased by adding information to a band edge of the OFDM symbol in connection with measures taken to reduce OOB spectral leakage from the OFDM symbol. Spectral leakage reduction measures can include application of a tapering window to at least a portion of OFDM data in the time domain to reduce power in side-lobes in the frequency domain. In some examples, such measures can comprise reducing transmission power at certain frequencies for a set of adjacent sub-carriers within the OFDM symbol at or near the band edge of the OFDM symbol. The additional bandwidth at the OFDM symbol can be used for many different applications, such as, without limitation, Device-to-Device (D2D) communication and/or Machine-to-Machine (M2M) communication.

主权项

1. A device for sending, from a transmitter located in one of an evolved NodeB (eNodeB) and a User Equipment (UE), information at a band edge of an Orthogonal Frequency-Division Multiplexing (OFDM) symbol, comprising:
a windowing module configured to apply a tapering window to at least a part of an OFDM symbol, the tapering window selected to reduce Out Of Band (OOB) spectral leakage in order to enable placement of information at the band edge of the OFDM symbol; a data module configured to provision the information to the OFDM symbol at the band edge; and a transmission module, the transmission module configured to transmit the OFDM symbol with the additional information in the band edge after application of the tapering window.