Equipment and method for mapping variable sub carriers
A subcarrier mapping and carrier mapping technology, applied in the field of data transmission, can solve the problems of low power efficiency of radio frequency amplifiers, increased receiving buffer, increased average delay, etc., to increase system throughput, increase effects, and reduce average weight The effect of the number of passes
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[0113] Example 1.
[0114] Different bit interleaving methods are used for each transmission of HARQ, and the bit interleaving method keeps the mapping relationship between bits and modulation symbols unchanged.
[0115] The number of bits contained in a HARQ transmission packet is N:
[0116] N=m×n (5)
[0117] Among them, m is the number of bits included in each modulation symbol; n is the number of modulation symbols included in the HARQ transmission data packet. With block interleaving, the number of given block interleaver columns is n C , the number of block interleaver rows is determined according to the number of bits contained in the HARQ transmission data packet:
[0118]
[0119] where: n R is the number of block interleaver rows; n C is the number of block interleaver columns; n is the number of bits contained in the HARQ transmission data packet.
[0120] The data bits are input into the bit interleaver row by row as follows: The sequenc...
Example Embodiment
[0160] Example 2.
[0161] Different bit interleaving methods are used for each transmission of HARQ, and the bit interleaving method can change the mapping relationship between bits and modulation symbols.
[0162] The number of bits contained in a HARQ transmission packet is N:
[0163] N=m×n (9)
[0164] Among them, m is the number of bits included in each modulation symbol; n is the number of modulation symbols included in the HARQ transmission data packet.
[0165] Using the block interleaving method, given the number of block interleaver columns C, the number of block interleaver rows determined according to the number of bits included in the HARQ transmission data packet is:
[0166]
[0167] Where: R is the number of block interleaver rows; C is the number of block interleaver columns; N is the number of bits included in the HARQ transmission data packet.
[0168] Input the data bits into the bit interleaver row by row, the data bit sequence is X...
Example Embodiment
[0199] Example 3.
[0200] The number n of modulation symbols contained in a given HARQ transmission packet d , corresponding to n s subcarriers, n d =n s . this n s The subcarriers may be continuous in the frequency domain, may be discrete, may be partially continuous and partially discrete, such as Figure 10 shown. Maximum number of HARQ transmissions n max . The following algorithm is used to determine the HARQ jth (0≤jmax ) times transmission, the subcarrier corresponding to each modulation symbol:
[0201]
[0202] Among them: k(0≤ks ) is the sequence number of the subcarriers; i (0≤id ) is the sequence number of modulation symbols; n d is the number of modulation symbols contained in the HARQ transmission data packet; n s The number of subcarriers used for HARQ data transmission; n max is the maximum number of HARQ transmissions; j(0≤jmax ) is the number of HARQ transmissions.
[0203] The above method is also applicable to SC-FDMA, its transmitter / receiv...
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