Patent ID: 8391233

Claim:
A method for mapping downlink dedicated pilots to resource elements in an Extended Cyclic Prefix (Extended CP) frame, applied in a Long Term Evolution (LTE) system, comprising: mapping the first downlink dedicated pilot of a port to the 5 th orthogonal frequency division multiplexing symbol of a physical resource block in the time domain, and to the A th subcarrier in the frequency domain; wherein the physical resource block comprises 12 subcarriers in the frequency domain and 12 orthogonal frequency division multiplexing symbols in the time domain, and wherein A is 1 or 2 or 3; mapping the second downlink dedicated pilot to the 5 th orthogonal frequency division multiplexing symbol in the time domain, and to the (A+3) th subcarrier in the frequency domain; mapping the third downlink dedicated pilot to the 5 th orthogonal frequency division multiplexing symbol in the time domain, and to the (A+6) th subcarrier in the frequency domain; mapping the fourth downlink dedicated pilot to the 5 th orthogonal frequency division multiplexing symbol in the time domain, and to the (A+9) th subcarrier in the frequency domain; mapping the fifth downlink dedicated pilot to the 8 th orthogonal frequency division multiplexing symbol in the time domain, and to the B th subcarrier in the frequency domain; wherein, B is 1 or 2 or 3; mapping the sixth downlink dedicated pilot to the 8 th orthogonal frequency division multiplexing symbol in the time domain, and to the (B+3) th subcarrier in the frequency domain; mapping the seventh downlink dedicated pilot to the 8 th orthogonal frequency division multiplexing symbol in the time domain, and to the (B+6) th subcarrier in the frequency domain; mapping the eighth downlink dedicated pilot to the 8 th orthogonal frequency division multiplexing symbol in the time domain, and to the (B+9) th subcarrier in the frequency domain; mapping the ninth downlink dedicated pilot to the 12 th orthogonal frequency division multiplexing symbol in the time domain, and to the C th subcarrier in the frequency domain; wherein, C is 1 or 2 or 3; mapping the tenth downlink dedicated pilot to the 12 th orthogonal frequency division multiplexing symbol in the time domain, and to the (C+3) th subcarrier in the frequency domain; mapping the eleventh downlink dedicated pilot to the 12 th orthogonal frequency division multiplexing symbol in the time domain, and to the (C+6) th subcarrier in the frequency domain; mapping the twelfth downlink dedicated pilot to the 12 th orthogonal frequency division multiplexing symbol in the time domain, and to the (C+9) th subcarrier in the frequency domain; and transmitting the Extended CP frame with the downlink dedicated pilots to a user equipment; wherein, only one port of downlink dedicated pilots is transmitted in the physical resource block.