Method and system for multiplexing acknowledgement signals and sounding reference signals

#The present application relates generally to wireless communications and, more specifically, to a method and system for multiplexing acknowledgement signals and sounding reference signals.

#In 3rd Generation Partnership Project Long Term Evolution (3GPP LTE), Orthogonal Frequency Division Multiplexing (OFDM) is adopted as a downlink (DL) transmission scheme.

#A base station is provided. The base station comprises a transmit path circuitry configured to determine a PUCCH format 3 nPUCCH(3) index and transmit an uplink grant to a subscriber station, the uplink grant having an indication of the PUCCH format nPUCCH(3) index. The base station also includes a receive path circuitry configured to receive a PUCCH format 3 signal in a subframe from the subscriber station. The receive path circuitry is also configured to receive a first demodulation reference signal for the PUCCH format 3 signal in the first slot of the subframe, the first demodulation reference signal determined based at least partly upon a first demodulation reference signal cyclic shift (DM RS CS) number nCS,0. The receive path circuitry is further configured to receive a second demodulation reference signal for the PUCCH format 3 signal in the second slot of the subframe, the second demodulation reference signal determined based at least partly upon a second DM RS CS number nCS,1. The first DM RS CS number nCS,0 is determined based on a first orthogonal cover code (OCC) number nOC,0 and a first spreading factor number NSF,0 for the first slot, and the second DM RS CS number nCS,1 is determined based on a second OCC number nOC,1 and a second spreading factor number NSF,1 for the second slot. The first OCC number nOC,0 is derived at least partly upon the PUCCH format 3 nPUCCH(3) PUCCH index and the second OCC number nOC,1 is derived at least partly upon the first OCC number nOC,0 and the second spreading factor number NSF,1. The first spreading factor number NSF,0 is equal to a number of available non-RS SC-FDM symbols of the PUCCH format 3 signal in the first time slot and the second spreading factor number NSF,1 is equal to a number of available non-RS SC-FDM symbols of the PUCCH format 3 signal in the second time slot.

#For a more complete understanding of the present disclosure and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings, in which like reference numerals represent like parts:

#FIG. 1 illustrates an exemplary wireless network that transmits messages in the uplink according to the principles of the present disclosure;

#FIG. 2 is a high-level diagram of an OFDMA transmitter according to one embodiment of the disclosure;

#FIGS. 1 through 15, discussed below, and the various embodiments used to describe the principles of the present disclosure in this patent document are by way of illustration only and should not be construed in any way to limit the scope of the disclosure. Those skilled in the art will understand that the principles of the present disclosure may be implemented in any suitably arranged wireless communication system.

#With regard to the following description, it is noted that the LTE term “node B” is another term for “base station” used below. Also, the LTE term “user equipment” or “UE” is another term for “subscriber station” used below.

#FIG. 1 illustrates exemplary wireless network 100, which transmits messages according to the principles of the present disclosure. In the illustrated embodiment, wireless network 100 includes base station (BS) 101, base station (BS) 102, base station (BS) 103, and other similar base stations (not shown)