RECEIVING AND PROCESSING DATA
A description is given of a method comprising method steps of receiving a data stream comprising first data transmitted from a first antenna and second data transmitted from a second antenna, generating a projection operator and applying the projection operator to the data stream such that the first data is separated from the data stream.
1 . A method comprising:
receiving a data stream comprising a first data transmitted from a first antenna and second data transmitted from a second antenna;
generating a projection operator; and
applying the projection operator to the data stream such that the first data is separated from the data stream.
2 . The method of claim 1 , wherein
the data stream is transmitted over transmission channels and the method further comprises:
generating a representation of the transmission channels in form of a full rank channel matrix.
3 . The method of claim 2 , wherein
the channel matrix comprises a first sub-matrix depending on the transmission channels associated with the first antenna and a second sub-matrix depending on the transmission channels associated with the second antenna and the method further comprises:
generating a first matrix by discarding a sub-matrix.
4 . The method of claim 3 , wherein
the projection operator projects the data stream on a first subspace which is orthogonal to a second subspace spanned by columns of the first matrix.
5 . The method of claim 2 , wherein
an entry of the channel matrix comprises a product of a channel impulse response, a spreading code and a scrambling code.
6 . The method of claim 1 , further comprising:
equalizing the first data after separating the first data from the data stream, in particular by an MMSE method; and
despreading and decoding the first data after separating the first data from the data stream.
7 . The method of claim 1 , further comprising:
generating a further projection operator; and
applying the further projection operator to the data stream such that the second data is separated from the data stream.
8 . A method comprising:
receiving a data stream at N reception antennas, the data stream comprising data transmitted from M transmission antennas, wherein M>N; and
processing the data stream such that data transmitted by one of the transmission antennas is separated from the data stream.
9 . The method of claim 8 , wherein
the data stream is transmitted over transmission channels and the method further comprises:
generating a representation of the transmission channels in form of a full rank channel matrix.
10 . The method of claim 8 , further comprising:
generating a projection operator.
11 . The method of claim 8 , further comprising:
equalizing the data after separating the data from the data stream, in particular by an MMSE method; and
despreading and decoding the data after separating the data from the data stream.
12 . A method comprising:
receiving a data stream at N reception antennas over transmission channels, the data stream comprising a data transmitted from M transmission antennas, wherein M>N; and
generating a representation of the transmission channels in form of a full rank channel matrix.
13 . The method of claim 12 , further comprising:
processing the data stream such that the data transmitted by one of the transmission antennas is separated from the data stream.
14 . The method of claim 12 , further comprising:
equalizing the data after separating the data from the data stream, in particular by an MMSE method; and
despreading and decoding the data after separating the data from the data stream.
15 . A receiver comprising:
at least one antenna to receive a data stream comprising first data transmitted from a first antenna and second data transmitted from a second antenna;
a first unit to generate a projection operator; and
a second unit to apply the projection operator to the data stream such that the first data is separated from the data stream.
16 . The receiver of claim 15 , wherein
the data stream is transmitted over transmission channels and the first unit is configured to generate a representation of the transmission channels in form of a full rank channel matrix.
17 . The receiver of claim 16 , wherein
the channel matrix comprises a first sub-matrix depending on the transmission channels associated with the first antenna and a second sub-matrix depending on the transmission channels associated with the second antenna and the first unit is configured to generate a first matrix by discarding a sub-matrix.
18 . The receiver of claim 17 , wherein
the projection operator projects the data stream on a first subspace which is orthogonal to a second subspace spanned by columns of the first matrix.
19 . The receiver of claim 16 , wherein
each entry of the channel matrix comprises a product of a channel impulse response, a spreading code and a scrambling code.
20 . The receiver of claim 15 , further comprising:
an equalizer for equalizing the first data after separating the first data from the data stream, wherein the equalizer is arranged downstream of the first and the second unit.
21 . The receiver of claim 15 , further comprising:
a despreader and a decoder for despreading and decoding the first data after separating the first data from the data stream, wherein the despreader and the decoder are arranged downstream of the first and the second unit.
22 . The receiver of claim 15 , wherein:
the first unit is configured to a generate a further projection operator; and
the second unit is configured to applying the further projection operator to the data stream such that the second data is separated from the data stream.
23 . A receiver comprising:
N reception antennas to receive a data stream comprising data transmitted from M transmission antennas, wherein M>N; and
a first unit to process the data stream such that the data transmitted by one of the transmission antennas is separated from the data stream.
24 . The receiver of claim 23 , wherein
the first unit is configured to generate a representation of transmission channels in form of a full rank channel matrix and to generate a projection operator.
25 . The receiver of claim 23 , further comprising
an equalizer to equalize the data after separating the data from the data stream; and
a despreader and a decoder for despreading and decoding the data after separating the data from the data stream, wherein the despreader and the decoder are arranged downstream of the first and a second unit.