| 摘要 |
A transmitter using pseudo-orthogonal code includes a serial-to-parallel converter for converting serial transmission data into 9-bit parallel data, and a pseudo-orthogonal code memory for receiving the parallel data from the serial-to-parallel converter and outputting 16-bit pseudo-orthogonal code by using the received data as addresses. The pseudo-orthogonal code memory has the relationship of the input address and output code, as expressed in the following equation: c(i)=0.5x((-1)b2⊕(i1<img id="CUSTOM-CHARACTER-00001" he="2.46mm" wi="1.78mm" file="US20090310706A1-20091217-P00001.TIF" img-content="character" img-format="tif"/>b1)⊕(i0<img id="CUSTOM-CHARACTER-00002" he="2.46mm" wi="1.78mm" file="US20090310706A1-20091217-P00001.TIF" img-content="character" img-format="tif"/>b0) (-1)b5⊕i2⊕(i1<img id="CUSTOM-CHARACTER-00003" he="2.46mm" wi="1.78mm" file="US20090310706A1-20091217-P00001.TIF" img-content="character" img-format="tif"/>b4)⊕(i0<img id="CUSTOM-CHARACTER-00004" he="2.46mm" wi="1.78mm" file="US20090310706A1-20091217-P00001.TIF" img-content="character" img-format="tif"/>b3) (-1)b8⊕i3⊕(i1<img id="CUSTOM-CHARACTER-00005" he="2.46mm" wi="1.78mm" file="US20090310706A1-20091217-P00001.TIF" img-content="character" img-format="tif"/>b7)⊕(i0<img id="CUSTOM-CHARACTER-00006" he="2.46mm" wi="1.78mm" file="US20090310706A1-20091217-P00001.TIF" img-content="character" img-format="tif"/>b6) (-1) ( b2⊕b5⊕b8)⊕i3⊕i2⊕(i1<img id="CUSTOM-CHARACTER-00007" he="2.46mm" wi="1.78mm" file="US20090310706A1-20091217-P00001.TIF" img-content="character" img-format="tif"/>(b1⊕b4⊕b7))⊕(i0<img id="CUSTOM-CHARACTER-00008" he="2.46mm" wi="1.78mm" file="US20090310706A1-20091217-P00001.TIF" img-content="character" img-format="tif"/>(b0⊕b3⊕b6))) where C(i) is a pseudo-orthogonal code value, i is each bit of the pseudo-orthogonal code, 0<=i<=15, and b0-b8 are a transmission data bit stream input in the memory as addresses. Accordingly, the transmission efficiency of the transmitter/receiver using orthogonal code can be remarkably improved.
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