Techniques for formatting signals for transmission using a wireless network

Abstract

Techniques are described for forming signals for transmission to a receiver. Two transmitters can form resource blocks with different Physical Uplink Control Channel (PUCCH) demodulation reference signal (DMRS) patterns that are orthogonal over time and/or frequency to each other. The transmitters can simultaneously transmit the same resource block but with different DMRS patterns. If a receiver is mounted with two antennas, the receiver can utilize a MIMO receiver to differentiate resource blocks from two transmitters.

What is claimed is: 
     
         1 . A computer-implemented method performed using a wireless mobile computing device comprising:
 requesting to form a signal, the signal comprising sub-carriers on at least two different frequencies wherein a first frequency of a first sub-carrier includes at least two different time slots and wherein a second frequency of a second sub-carrier includes at least two different time slots;   requesting assignment of a first data portion to one of the time slots of the first sub-carrier;   requesting assignment of a second data portion to another of the time slots of the first sub-carrier with a first frequency; and   requesting assignment of a demodulation reference signal (DMRS) pattern in the signal.   
     
     
         2 . The method of  claim 1 , wherein
 the first data portion comprises a data symbol multiplied by a value that is orthogonal in the frequency domain and   the second data portion comprises a data symbol multiplied by a value that is orthogonal in the frequency domain.   
     
     
         3 . The method of  claim 1 , wherein
 the first data portion comprises a data symbol multiplied by a time domain orthogonal cover and   the second data portion comprises a data symbol multiplied by a time domain orthogonal cover.   
     
     
         4 . The method of  claim 1 , wherein
 the first data portion comprises a Discrete Fourier Transform precoded data symbol and   the second data portion comprises a second Discrete Fourier Transform precoded data symbol.   
     
     
         5 . The method of  claim 1 , wherein the DMRS pattern comprises at least one frequency orthogonal code. 
     
     
         6 . The method of  claim 1 , wherein the DMRS pattern comprises a plurality of frequency orthogonal codes that are not in adjacent time slots. 
     
     
         7 . The method of  claim 1 , wherein the DMRS pattern comprises a product of time orthogonal and frequency orthogonal values and the DMRS pattern are allocated in adjacent time slots. 
     
     
         8 . A computer-implemented method performed using a wireless computing device comprising:
 receiving first and second resource blocks, the first and second resource blocks each including orthogonal demodulation reference signal (DMRS) patterns;   requesting estimation of the channels used for transmission of the first and second resource blocks; and   requesting determination of data values from the first and second resource blocks based on the estimation.   
     
     
         9 . The method of  claim 8 , further comprising:
 using multiple-input multiple-output communications (MIMO) techniques to separate the data portions for multiple user elements.   
     
     
         10 . The method of  claim 9 , wherein the using MIMO techniques comprises using Minimum Mean Square Error (MMSE) or Maximum Likelihood Detection (MLD). 
     
     
         11 . The method of  claim 8 , wherein the first and second resource blocks include data portions and each of the data portions comprise one of: a data symbol multiplied by a value that is orthogonal in the frequency domain, a data symbol multiplied by a time domain orthogonal cover, and a Discrete Fourier Transform precoded data symbol. 
     
     
         12 . The method of  claim 8 , wherein the DMRS patterns comprise one of: frequency orthogonal codes, frequency orthogonal codes that are not in adjacent time slots, and a product of time orthogonal and frequency orthogonal values allocated in adjacent time slots. 
     
     
         13 . A system comprising:
 at least one antenna;   a radio communicatively coupled to the at least one antenna; and   a processor configured to:
 request to form a signal, the signal comprising sub-carriers on at least two different frequencies wherein a first frequency of a first sub-carrier includes at least two different time slots and wherein a second frequency of a second sub-carrier includes at least two different time slots; 
 request assignment of a first data portion to one of the time slots of the first sub-carrier; 
 request assignment of a second data portion to another of the time slots of the first sub-carrier with a first frequency; and 
 request assignment of a demodulation reference signal (DMRS) pattern in the signal. 
   
     
     
         14 . The system of  claim 13 , wherein
 the first data portion comprises a data symbol multiplied by a value that is orthogonal in the frequency domain and   the second data portion comprises a data symbol multiplied by a value that is orthogonal in the frequency domain.   
     
     
         15 . The system of  claim 13 , wherein
 the first data portion comprises a data symbol multiplied by a time domain orthogonal cover and   the second data portion comprises a data symbol multiplied by a time domain orthogonal cover.   
     
     
         16 . The system of  claim 13 , wherein
 the first data portion comprises a Discrete Fourier Transform precoded data symbol and   the second data portion comprises a second Discrete Fourier Transform precoded data symbol.   
     
     
         17 . The system of  claim 13 , wherein
 the DMRS pattern comprises at least one of: at least one frequency orthogonal code, a plurality of frequency orthogonal codes that are not in adjacent time slots, or a product of time orthogonal and frequency orthogonal values and the DMRS pattern are allocated in adjacent time slots.