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US 7,773,685 B2Granted
Transmitting and receiving methods
AssigneeNokia Corporation
InventorsOlav Tirkkonen, Mikko Kokkonen, Kari Kallojärvi, Rinat Kashaev
Life of this patent
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Abstract
This invention describes a wireless system comprising a plurality of transmitters and receivers, wherein each transmitter has between 1 and n antennas and each receiver has between 1 and m antennas wherein one of said transmitter is arranged to transmit to one of the receivers, said one transmitter is controlled in dependence on at least one of at least one parameter of said transmitters, at least one parameter of said receiver, and at least one parameter of a wireless environment between said transmitter and said receiver.
Claims63
A system comprising:
- a plurality of transmitters and receivers, wherein each transmitter comprises at least one transmitter element and each receiver comprises at least one receiver element and wherein one of said plurality of transmitters is configured to transmit to one of said plurality of receivers, said one of said plurality of transmitters further comprising
- data transmitting circuitry,
- determining circuitry configured to determine an estimated value based on at least one parameter of said one of said plurality of transmitters, at least one parameter of said one of said plurality of receivers, and at least one parameter of a wireless environment between said one of said plurality of transmitters and said one of said plurality of receivers, and
- controller circuitry configured to control said data transmitting circuitry and said at least one transmitter element in accordance with said estimated value,
- wherein said estimated value is a practical rank number, wherein said practical rank number is defined as the number of singular values of a matrix H above a threshold value, where H is a channel transfer matrix, and said practical rank number is no greater than the smallest of the number of said transmitter elements and the number of receiver elements of said one of said plurality of receivers.
2 more elements
An apparatus, comprising:
- a plurality of transmitter elements;
- a data transmitter;
- and
- a processor configured to determine an estimated value based on at least one parameter of said apparatus, at least one parameter of a receiver to which said apparatus is configured to transmit, and at least one parameter of a wireless environment between said apparatus and said receiver comprising a plurality of receiver elements, and to control said data transmitter and said transmitter elements in accordance with said estimated value,
- wherein said estimated value is a practical rank number, wherein said practical rank number is defined as the number of singular values of a matrix H above a threshold value, where H is a channel transfer matrix, and said practical rank number is no greater than the smallest of the number of transmitter elements and the number of receiver elements of said receiver.
2 more elements
An apparatus, comprising:
- a plurality of transmitter elements;
- a processor configured to receive capability information of a receiver to which said apparatus is configured to transmit;
- and
- a beam transmitter configured to transmit a plurality of beams, said receiver being configured to receive said plurality of beams,
- wherein the processor is configured to control said transmitter elements in accordance with at least one parameter of said apparatus;
- at least one parameter of said receiver;
- at least one parameter of a wireless environment between said apparatus and said receiver,
- wherein said processor is configured to multiply a stream of symbols (x) to be transmitted by a first number (n) of transforms to generate a resultant transformation used in the generation of said beams,
- wherein the first number (n) of transforms used are selected dependent on at least one parameter of said apparatus;
- at least one parameter of said receiver;
- at least one parameter of a wireless environment between said apparatus and said receiver and the capacity of the first number (n) of selected transforms,
- wherein the capacity of the first number (n) of selected transforms is inversely related to the self-interference and the self-interference (SI) of 2KT selected transforms and their symbols is defined by,
- SI
- =
- ∑
- i
- =
- 1
- i
- =
- 2
-
- KT
-
- ∑
- k
- =
- i
- +
- 1
- k
- =
- 2
-
- KT
-
- x
- i
-
- x
- k
-
- SI
- (
- i
- ,
- k
- )
- where SI(i,k)=βi*βk+βk*βi and β is the transform, and
- wherein K is a number of independent modulatable data streams, T denotes how many slots of space-time the modulator extends over.
47 more elements
An apparatus, comprising:
- a plurality of transmitter elements;
- a beam transmitter configured to transmit a plurality of beams to a receiver configured to receive said plurality of beams;
- and
- a processor configured to control said transmitter elements in accordance with at least one parameter of said apparatus;
- at least one parameter of said receiver;
- and at least one parameter of a wireless environment between said apparatus and said receiver,
- wherein said processor is configured to multiply a stream of symbols to be transmitted by a first number (n) of transforms to generate a resultant transformation used in the generation of said beams,
- wherein said processor is further configured to select the first number (n) of transforms used dependent on said at least one parameter of said apparatus;
- said at least one parameter of said receiver;
- and said at least one parameter of a wireless environment between said apparatus and said receiver, wherein said apparatus is configured to transmit the symbol stream comprising the real and imaginary parts of a series of complex symbols and said apparatus is configured to transmit four beams, over four substantially orthogonal transmission resources using a set of transforms determined by the Clifford basis set comprising thirty-two elements,
- wherein said Clifford basis set is defined as the 16 real tensor products of the Alamouti basis set and 16 imaginary tensor products of the Alamouti basis set, and
- wherein the set of transforms used to transmit said four beams, over said four substantially orthogonal transmission resources are defined as,
- B
- 0
- =
- {
- β
- 0
-
- v
- }
- v
-
- =
- 0
- 3
- ,
- B
- 1
- =
- {
- β
- 1
-
- v
- }
- v
-
- =
- 0
- 3
- B
- 2
- =
- {
- β
- 2
-
- v
- }
- v
-
- =
- 0
- 3
- ,
- B
- 3
- =
- {
- β
- 3
-
- v
- }
- v
-
- =
- 0
- 3
- where βμν=τμ{circumflex over (x)}τν,μ,νε{0,1,2,3}
- and
- τ
- 0
- =
- I
- 2
- =
- [
- 1
- 0
- 0
- 1
- ]
- ;
- τ
- 1
- =
- [
- 0
- 1
- -
- 1
- 0
- ]
- ;
- τ
- 2
- =
- [
- 0
- j
- j
- 0
- ]
- ;
- τ
- 3
- =
- [
- j
- 0
- 0
- -
- j
- ]
- .
114 more elements
A method, comprising:
- receiving a stream of symbols (x) to be transmitted;
- selecting a first number (n) of transforms in dependence on at least one of a wireless radio environment between a transmitter configured to transmit a plurality of beams and a receiver configured to receive said plurality of beams, at least one receiver characteristic, at least one transmitter characteristic;
- and the capacity of the first number (n) of transforms;
- multiplying said stream of symbols to be transmitted by said n transforms to generate a resultant transformation used in the generation of said beams;
- and
- determining the capacity of the first number (n) of the transforms,
- wherein determining the capacity of the first number (n) of transforms comprises
- determining the self-interference (SI) of 2KT selected transforms and their symbols is defined by,
- SI
- =
- ∑
- i
- =
- 1
- i
- =
- 2
-
- KT
-
-
- ∑
- k
- =
- i
- +
- 1
- k
- =
- 2
-
- KT
-
- x
- i
-
- x
- k
-
- SI
- (
- i
- ,
- k
- )
- where SI(i,k)=βi*βk+βk*βi and β is the transform, and
- wherein K is a number of independent modulatable data streams, and T denotes how many slots of space-time the modulator extends over.
44 more elements
A method, comprising:
- determining an estimated value based on at least one parameter of a transmitter, at least one parameter of a receiver to which said transmitter is to transmit, and/or at least one parameter of a wireless environment between said transmitter and said receiver, wherein each transmitter comprises one or more transmitter elements and each receiver comprises one or more receiver elements;
- and
- controlling said one or more transmitter elements to transmit to said receiver dependent on said estimated value, wherein said estimated value is a practical rank number no greater than the smallest of the number of transmitter elements of said transmitter and the number of receiver elements of said receiver to which said transmitter is transmitting, and wherein said practical rank number is defined as the number of singular values of a matrix H above a threshold value, where H is a channel transfer matrix.
Dependencies are inferred from the claim text.