Patent ID: 8571120
Filing Date: 2013-10-29
Classification: H04L

Abstract:
1. A method for transmitting in a wireless cellular network, comprising: determining a data value for an ACK/NACK status information; mapping the data value for the ACK/NACK status information to a cyclic shift amount of a reference signal, wherein the ACK/NACK status information is embedded in the reference signal; constructing a pre-defined base signal using orthogonal frequency-division multiplexing (OFDM) modulation, where OFDM modulation comprises mapping a constant amplitude sequence onto a set of tones; cyclically shifting the base signal in the time-domain by the mapped cyclic shift amount representative of the data value to form a cyclic shifted base signal; and transmitting the cyclic shifted base signal to a receiver, whereby the receiver can determine the data value by determining the shift amount, wherein the cyclic shifts are different cyclic shift of constant amplitude zero cyclic auto-correction (CAZAC) sequence with zero auto-correlation properties providing orthogonal transmissions.