Transmission apparatus and base station apparatus using the same

Abstract

The transmission apparatus according to the present invention includes a switching device that switches the multiplexing destination of mask symbols and uses this switching device to switch the multiplexing destination of the mask symbols so that the mask symbols multiplexed with control channel signals transmitted in parallel from a plurality of antennas may be transmitted from only one antenna at each transmission timing.

1. A transmission apparatus comprising:
 a search code provider that provides a search code to be used for cell search;    a plurality of transmission sections that transmit a plurality of control channel signals in parallel; and    a multiplexer that multiplexes said search code with a first control channel signal of said plurality of control channel signals at a specific timing,    wherein said multiplexer switches from multiplexing said search code with said first control channel signal to multiplexing said search code with another control channel signal of said plurality of control channel signals over time.    
     
     
       2. The transmission apparatus according to  claim 1 , wherein said multiplexer multiplexes the search code alternately with the plurality of control channel signals. 
     
     
       3. The transmission apparatus according to  claim 1 , wherein said transmission apparatus uses an orthogonal transmission diversity technique. 
     
     
       4. The transmission apparatus according to  claim 1 , wherein said multiplexer time-multiplexes the search code with the plurality of control channel signals. 
     
     
       5. The transmission apparatus according to  claim 1 , wherein said multiplexer code-multiplexes the search code with the plurality of control channel signals. 
     
     
       6. The transmission apparatus according to  claim 1 , wherein said search code provider provides a plurality of codes as the search code, and said multiplexer multiplexes separately the plurality of codes with the plurality of control channel signals. 
     
     
       7. The transmission apparatus according to  claim 1 , wherein said search code provider provides a plurality of codes as the search code, and said multiplexer multiplexes in synchronization the plurality of codes with the plurality of control channel signals. 
     
     
       8. A base station apparatus comprising a transmission apparatus comprising:
 a search code provider that provides a search code to be used for cell search;    a plurality of transmission sections that transmit a plurality of control channel signals in parallel; and    a multiplexer that multiplexes said search code with a first control channel signal of said plurality of control channel signals at a specific timing,    wherein said multiplexer switches from multiplexing said search code with said first control channel signal to multiplexing said search code with another control channel signal of said plurality of control channel signals over time.    
     
     
       9. A transmission method used in a CDMA radio communication system, comprising:
 (a) providing a search code to be used for cell search;    (b) transmitting a plurality of control channel signals in parallel; and    c) multiplexing said search code with a first control channel signal of said plurality of control channel signals at a specific timing, and switching from multiplexing said search code with said first control channel signal to multiplexing said search code with another control channel signal of said plurality of control channel signals over time.    
     
     
       10. The transmission apparatus according to  claim 1 , wherein said multiplexer multiplexes the search code with said another control channel signal at a specific timing which is different from said specific timing that said multiplexer multiplexes said search code with said first control channel signal. 
     
     
       11. The transmission apparatus according to  claim 8 , wherein said multiplexer multiplexes the search code with said another control channel signal at a specific timing which is different from said specific timing that said multiplexer multiplexes said search code with said first control channel signal. 
     
     
       12. The transmission apparatus according to  claim 9 , wherein said multiplexer multiplexes the search code with said another control channel signal at a specific timing which is different from said specific timing that said multiplexer multiplexes said search code with said first control channel signal. 
     
     
       13. A transmission apparatus comprising:
   a search code provider that provides a search code to be used for cell search;        a plurality of transmission sections that transmit a plurality of control channel signals in parallel; and        a multiplexing component that multiplexes said search code with a first control channel signal and a second control channel signal of said plurality of control channel signals at a specific timing,        wherein said first control channel signal and said second control channel signal are alternatively transmitted over time.      
     
     
       14. The transmission apparatus according to  claim 13 , wherein said transmission apparatus uses an orthogonal transmission diversity technique.  
     
     
       15. The transmission, apparatus according to  claim 13 , wherein said multiplexer time multiplexes the search code with the plurality of control channel signals.  
     
     
       16. The transmission apparatus according to  claim 13 , wherein said multiplexer code multiplexes the search code with the plurality of control channel signals.  
     
     
       17. The transmission apparatus according to  claim 13 , wherein said search code provider provides a plurality of codes as the search code, and said multiplexer multiplexes separately the plurality of codes with the plurality of control channel signals.  
     
     
       18. The transmission apparatus according to  claim 13 , wherein said search code provider provides a plurality of codes as the search code, and said multiplexer multiplexes in synchronization the plurality of codes with the plurality of control channel signals.  
     
     
       19. A base station apparatus comprising a transmission apparatus comprising: a search code provider that provides a search code to be used for cell search;
   a plurality of transmission sections that transmit a plurality of control channel signals in parallel; and        a multiplexing component that multiplexes said search code with a first control channel signal and a second control channel signal of said plurality of control channel signals at a specific timing,        wherein said first control channel signal and said second control channel signal are alternatively transmitted over time.      
     
     
       20. The transmission apparatus according to  claim 13 , wherein said multiplexer multiplexes the search code with said another control channel signal at a specific timing which is different from said specific timing that said multiplexer multiplexes said search code with said first control channel signal.  
     
     
       21. A transmission method used in a spread spectrum radio communication system, comprising:
 ( a )  providing a code to be used for cell search;      ( b )  transmitting a first parallel signal, wherein the first parallel signal corresponds to a first control channel signal multiplexed with the code; and      ( c )  transmitting a second parallel signal, wherein the second parallel signal corresponds to a second control channel signal multiplexed with the code;        wherein the first and second parallel signals are transmitted utilizing time switched transmit diversity.      
     
     
       22. The transmission apparatus according to  claim 21 , wherein said multiplexer multiplexes the search code with said another control channel signal at a specific timing which is different from said specific timing that said multiplexer multiplexes said search code with said first control channel signal.  
     
     
       23. A transmission method used in a spread spectrum radio communication system, comprising:
 ( a )  providing a code to be used for cell search;      ( b )  periodically transmitting a first signal through a first antenna, wherein the first parallel signal corresponds to a first control channel signal multiplexed with the code; and      ( c )  alternatively transmitting a second signal through a second antenna over time, wherein the second parallel signal corresponds to a second control channel signal multiplexed with the code.      
     
     
       24. An apparatus comprising:
   a reception device for obtaining a parallel signal from a base station apparatus, wherein the base station apparatus comprises:    ( a )  a search code provider that provides a search code to be used for cell search;      ( b )  a plurality of transmission sections that transmit a plurality of control channel signals in parallel; and      ( c )  a multiplexing component that multiplexes said search code with a first control channel signal and a second control channel signal of said plurality of control channel signals at a specific timing,          wherein said first control channel signal and said second control channel signal are alternatively transmitted over time.