摘要:
The present invention relates to a method for transmitting data including a bit interleaving step for permutating encoded data bits Tb before their transmission in the form of modulation symbols over Nt transmitting antennas. According to the invention, the bit interleaving step involves: bit demultiplexing DMXS for extracting bit sequences Bsj (for j=0 to Nt) from the encoded data bits Tb, sequence interleaving SRIS for permutating the bits of each sequence Bsj (for j=0 to Nt), sequence storing and segmenting SQSS for dividing each interleaved sequence Isqj (for j=0 to Nt) into successive segments Psgj, and segment shifting SGS for applying circular shifts to simultaneous different segments Psgj (for j=1 to Nt). The invention enables to ensure that consecutive encoded bits see a maximum number of different communication channel states, and thus favours data diversity.
摘要:
The present invention relates to a method for transmitting data between a transmitter provided with at least two transmitting antennas (ta1, ta2 . . . taNt) and a receiver. The method according to the invention further includes a symbol spreading step in the course of which components Zij (for i=I to S and j=I to Nt) of a predetermined number of successive symbols ZI . . . ZS are to be spread over time before being transmitted over said transmitting antennas (ta1, ta2 . . . taNt). The data transmitted at any given moment will thus not be representative of a single symbol Zi (for i=1 to S), as is the case in known MIMO systems, but will represent a mixture between Nt components of S successive symbols, which introduces data diversity with respect to time as perceived at the receiver end.
摘要:
“Method for transmitting uniformly distributed data in a MIMO telecommunication system”The present invention relates to a method for transmitting data by means of Nt transmitting antennas over comunication channels featuring Ni inputs. The method according to the invention includes a bit interleaving step involving: bit demultiplexing DMXS, sequence interleaving SRIS, sequence storing and segmenting, segment permutation SPS, and sequence allocation ALS for forming groups G1, G2 of Nt permutated bit sequences Psqj intended to be transmitted through Nt channels allocated to a same bit rank for all transmitting antennas. The invention ensures an essentially homogeneous distribution of the encoded data bits over the different channel inputs, and thus favours data diversity.
摘要:
A method for decoding at least one signal, including: receiving the at least one signal, the at least one signal being transmitted by at least one transmitting antenna and received by at least one receiving antenna; defining a sphere having a predetermined radius and being centered on a particular symbol chosen among predetermined symbols forming a lattice constellation of symbols which may be received by the receiving antenna; and producing estimated symbols representative of at least one transmitted symbol carried by the at least one signal and identified among the predetermined symbols included in the sphere and likelihood values associated to the estimated symbols.
摘要:
A method for transmitting data using Nt transmitting antennas over communication channels featuring Ni inputs. The method includes a bit interleaving step including demultiplexing a frame of encoded data bits into a number of bit sequences equal to the predefined number Ni of channel inputs, permutating the bits of each bit sequence produced by the demultiplexing step, forming groups of Nt interleaved bit sequences successively produced by the sequence permutating step, all sequences of a same group being intended to be transmitted through Nt channels allocated to a same bit rank for all transmitting antennas.
摘要:
The present invention relates to a method for transmitting data between a transmitter provided with at least two transmitting antennas (ta1, ta2 . . . taNt) and a receiver. The method according to the invention further includes a symbol spreading step in the course of which components Zij (for i=I to S and j=I to Nt) of a predetermined number of successive symbols ZI . . . ZS are to be spread over time before being transmitted over said transmitting antennas (ta1, ta2 . . . taNt). The data transmitted at any given moment will thus not be representative of a single symbol Zi (for i=1 to S), as is the case in known MIMO systems, but will represent a mixture between Nt components of S successive symbols, which introduces data diversity with respect to time as perceived at the receiver end.
摘要:
The present invention relates to a method for transmitting data including a bit interleaving step for permutating encoded data bits Tb before their transmission in the form of modulation symbols over Nt transmitting antennas. According to the invention, the bit interleaving step involves bit demultiplexing DMXS for extracting bit sequences Bsj (for j=0 to Nt) from the encoded data bits Tb, sequence interleaving SRIS for permutating the bits of each sequence Bsj (for j=0 to Nt), sequence storing and segmenting SQSS for dividing each interleaved sequence Isqj (for j=0 to Nt) into successive segments Psgj, and segment shifting SGS for applying circular shifts to simultaneous different segments Psgj (for j=1 to Nt). The invention enables to ensure that consecutive encoded bits see a maximum number of different communication channel states, and thus favours data diversity.
摘要:
The present invention relates to a method for decoding a signal, which method includes a symbol decoding step for producing estimated symbols (p1 . . . p5) representative of symbols carried by a received signal, and likelihood values associated to said estimated symbols, which estimated symbols are identified among predetermined symbols forming a lattice constellation LATR and are included in a sphere SPH having a predetermined radius Rd. In the method according to the invention, this sphere SPH is centered on a particular symbol MLP chosen among the predetermined symbols forming the lattice constellation LATR. The invention ensures, by directly centering the sphere SPH on a symbol belonging to the lattice constellation LATR instead of centering it on a point y representing the received symbol, that said sphere SPH will encompass a statistically significant number of lattice constellation symbols
摘要:
A method and apparatus for adjusting the transmission power of signals transferred by at least one home base station through a wireless interface to a mobile device, the at least one home base station being located in the cell of a base station. The transmission power is adjusted by first performing an inter cell interference coordination procedure including determining at least one high interference reference zone for the at least one home base station. Then the signal transmission power adjustment for the at least one home base station is determined to ensure a given outage probability that a given function g representing the mobile terminal performance degradation is lower than or equal to a threshold value in the high interference reference zone around the at least one home base station.
摘要:
The present invention concerns a method for adjusting the transmission power of the signals transferred by at least one home base station through a wireless interface, the at least one home base station being located in the cell of a base station. The method comprises the steps of: —determining at least one high interference reference zone for the at least one home base station, which is a zone in which signals transferred by the base station and the at least one home base station interfere and on which interferences are controlled, —determining the signal transmission power for the at least one home base station which is set in order to ensure a given outage probability that a given function representing the mobile terminal performance degradation is lower than or equal to a threshold in the high interference reference zone around the at least one home base station.