Device and method of dynamically assigning subgroups of spreading sequences

Device and method of dynamically assigning subgroups of spreading sequences

  • CN 1,713,554 B
  • Filed: 06/24/2005
  • Issued: 03/05/2014
  • Est. Priority Date: 06/25/2004
  • Status: Active Grant
First Claim
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1. by base station, to the mobile terminal of multi-carrier transmission network, dynamically distributed frequency expansion sequence subgroup and the balanced method that is sent to the data symbol of base station by mobile terminal of one group of frequency expansion sequence,Wherein each subgroup comprises the frequency expansion sequence different from being included in frequency expansion sequence in other subgroup, and each frequency expansion sequence subgroup comprises the first frequency expansion sequence and at least one other frequency expansion sequence,Wherein each mobile terminal is carried out:

  • With the frequency pilot sign that will send to base station, be multiplied by each element of the first frequency expansion sequence,On corresponding subcarrier, the element of the first frequency expansion sequence after multiplying each other is sent to base station,With the data symbol that will send to base station, be multiplied by each element of at least one other frequency expansion sequence,On corresponding subcarrier, send the element of at least one other frequency expansion sequence after multiplying each other,Wherein by each mobile terminal, carried out through the following steps the transmission of the element after multiplying each other;

    The element of other frequency expansion sequences to the element of the first frequency expansion sequence after multiplying each other and after multiplying each other is sued for peace to form stream,In time and frequency, shine upon formed stream,And wherein said method also comprises the following step of being carried out by base station;

    From mobile terminal, be received in the stream that time and frequency are shone upon,In time and frequency, get on to shine upon the stream receiving to form the data symbol that removes the frequency pilot sign of mapping and go mapping,By going the frequency pilot sign of mapping to multiply each other to separate with the first frequency expansion sequence of frequency expansion sequence subgroup that is assigned to the mobile terminal of pilot symbol transmitted the frequency pilot sign that spread spectrum receives from each mobile terminal,By going the data symbol of mapping to multiply each other to separate with other frequency expansion sequences that are assigned to the frequency expansion sequence subgroup of the mobile terminal that sends data symbol the data symbol that spread spectrum receives from each mobile terminal,According to the measured value of separating the frequency pilot sign being sent by corresponding mobile terminal after spread spectrum, estimate the channel frequency response between each mobile terminal and base station,According to the estimation of the channel frequency response between the corresponding mobile terminal that sends data symbol and base station come balanced each separate the data symbol of spread spectrum.

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