Control of SAR in mobile transmit diversity systems employing beam forming by using coupling between diversity branches
First Claim
Patent Images
1. A communication system comprising:
- a first input, the first input adapted to receive a first input signal;
a second input, the second input adapted to receive a second input signal, wherein the first input signal and the second input signal are configured for diversity transmission;
a coupling network, the coupling network connected to the first input and the second input, where the coupling network is adapted to combine a sample of the first input signal with the second input signal to form a coupled output signal;
a first antenna, the first antenna adapted to radiate the first input signal;
a second antenna, the second antenna adapted to radiate the coupled output signal;
wherein the coupling network is adapted to maximize a diversity signal strength of the first input signal and the coupled output signal, while maintaining specific absorption rate below a predefined level.
2 Assignments
0 Petitions
Accused Products
Abstract
A system and method for maximizing signal strength while limiting specific absorption rate in diversity transmission network is achieved by coupling a first input signal to a second input signal. The system includes a sampler, a coupling network, and combiner.
14 Citations
15 Claims
-
1. A communication system comprising:
-
a first input, the first input adapted to receive a first input signal; a second input, the second input adapted to receive a second input signal, wherein the first input signal and the second input signal are configured for diversity transmission; a coupling network, the coupling network connected to the first input and the second input, where the coupling network is adapted to combine a sample of the first input signal with the second input signal to form a coupled output signal; a first antenna, the first antenna adapted to radiate the first input signal; a second antenna, the second antenna adapted to radiate the coupled output signal; wherein the coupling network is adapted to maximize a diversity signal strength of the first input signal and the coupled output signal, while maintaining specific absorption rate below a predefined level. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A method for maximizing diversity signal strength without exceeding a specific absorption rate by coupling a first input signal and a second input signal in a diversity transmission system, the method comprising the steps of:
-
sampling the first input signal between a first antenna and a coupling network; modifying the sample of the first input signal; combining the second input signal with the modified sample of the first input signal, and radiating the combined signal from a second antenna; radiating the first input signal from the first antenna; wherein the signal radiated from the first antenna and the signal radiated from the second antenna are adapted to form a diversity transmission signal; and wherein the coupling network is adapted to maintain specific absorption rate below a predefined level. - View Dependent Claims (9, 10, 11, 12, 13)
-
-
14. A diversity transmission circuit comprising:
-
an input, the input adapted to receive a signal for transmission to a receiver located at a location; a sampler adapted to divide the input into a first signal and a second signal; a parameter modifier adapted to modify the second signal in order to direct the signal for transmission to the location; a first antenna adapted to receive and transmit the first signal; a coupling network receiving the first signal and modifying the first signal, the coupling network outputting the modified first signal to a combiner, the combiner also receiving the modified second signal and outputting a combination of the modified first signal and the modified second signal to a second antenna, the second antenna adapted to receive and transmit the combined signal. - View Dependent Claims (15)
-
Specification