Resource block based multicarrier modulations for agile spectrum

Abstract

A resource block (RB)-based multicarrier modulation (MCM) transmitter and receiver structure for spectral agile systems are disclosed. The transmitter and the receiver are capable of sharing opportunistically available and non-contiguous channels with other users. The RB-MCM partitions the available spectrum, contiguous or non-contiguous, into multiple RBs (same or different sizes), applies a baseband MCM or single carrier modulation, or coded single carrier or multicarrier schemes in each RB with a type of spectral leakage reduction technique, and applies RB modulation for each RB to modulate the signal from baseband to the frequency band of that RB. At the receiver, the received signal may be filtered and RB demodulation may be applied to put each RB signal in baseband and a baseband multicarrier or single carrier or coded single carrier or coded multicarrier demodulation may be applied to each RB signal. Different RBs may use different modulation schemes.

What is claimed is: 
     
         1 . A method for performing multicarrier modulation in a wireless communication device, the method comprising:
 partitioning non-contiguous available spectrum into a plurality of resource blocks (RBs), wherein each RB of the plurality of RBs comprises a plurality of subcarriers;   applying a modulation scheme on a block of input symbols on each of the plurality of RBs separately, wherein the modulation scheme is different for at least one of the plurality of RBs;   filtering and windowing each modulated block of input symbols on each of the plurality of RBs separately to form a plurality of per-RB baseband filtered signals;   performing RB modulation on each of the plurality of per-RB baseband filtered signals separately to modulate each per-RB baseband filtered signal into a frequency band of each RB to form per-RB multicarrier modulated signals;   summing the per-RB multicarrier modulated signals for transmission; and   transmitting the summed per-RB multicarrier modulated signals.   
     
     
         2 . The method of  claim 1 , further comprising:
 adding a cyclic prefix (CP) or symbol extension to each modulated block of input symbols on each of the plurality of RBs separately; and   performing upsampling on each modulated block of input symbols on each of the plurality of RBs separately.   
     
     
         3 . The method of  claim 1 , wherein the modulation scheme is one of at least orthogonal frequency division multiplexing (OFDM), filtered orthogonal frequency division multiplexing (F-OFDM), single carrier modulation (SCM), or precoded orthogonal frequency division multiplexing (P-OFDM). 
     
     
         4 . The method of  claim 1 , wherein each RB of the plurality of RBs is comprised of a different number of subcarriers. 
     
     
         5 . The method of  claim 1 , further comprising:
 scaling a power of each of the per-RB multicarrier modulated signals separately.   
     
     
         6 . The method of  claim 1 , further comprising:
 applying a phase rotation technique to each per-RB multicarrier modulated signal, wherein at least one of the phase rotation techniques is different.   
     
     
         7 . The method of  claim 6 , wherein one of the phase rotation techniques is selective level mapping (SLM) or partial transmit sequences (PTS). 
     
     
         8 . A wireless communication device for performing multicarrier modulation, the wireless communication device comprising:
 a processor operatively coupled to a transmitter, the processor and transmitter configured to:
 partition non-contiguous available spectrum into a plurality of resource blocks (RBs), wherein each RB of the plurality of RBs comprises a plurality of subcarriers; 
 apply a modulation scheme on a block of input symbols on each of the plurality of RBs separately, wherein the modulation scheme is different for at least one of the plurality of RBs; 
 filter and window each modulated block of input symbols on each of the plurality of RBs separately to form a plurality of per-RB baseband filtered signals; 
 perform RB modulation on each of the plurality of per-RB baseband filtered signals separately to modulate each per-RB baseband filtered signal into a frequency band of each RB to form per-RB multicarrier modulated signals 
 sum the per-RB multicarrier modulated signals for transmission; and 
 transmit the summed per-RB multicarrier modulated signals. 
   
     
     
         9 . The wireless communication device of  claim 8 , wherein the processor and transmitter are further configured to:
 add a cyclic prefix (CP) or symbol extension to each modulated block of input symbols on each of the plurality of RBs separately; and   perform upsampling on each modulated block of input symbols on each of the plurality of RBs separately.   
     
     
         10 . The wireless communication device of  claim 8 , wherein the modulation scheme is one of at least orthogonal frequency division multiplexing (OFDM), filtered orthogonal frequency division multiplexing (F-OFDM), single carrier modulation (SCM), or precoded orthogonal frequency division multiplexing (P-OFDM). 
     
     
         11 . The wireless communication device of  claim 8 , wherein each RB of the plurality of RBs is comprised of a different number of subcarriers. 
     
     
         12 . The wireless communication device of  claim 8 , wherein the processor and transmitter are further configured to:
 scale a power of each of the per-RB multicarrier modulated signals separately.   
     
     
         13 . The wireless communication device of  claim 8 , wherein the processor and transmitter are further configured to:
 apply a phase rotation technique to each per-RB multicarrier modulated signal, wherein at least one of the phase rotation techniques is different.   
     
     
         14 . The wireless communication device of  claim 13 , wherein at least one of the phase rotation techniques is selective level mapping (SLM) or partial transmit sequences (PTS).