Data transmission method, and transmitter
First Claim
1. A data transmission method in a wireless data transmission system where signals (200, 202, 204) with one or more data rates and quality levels are transmitted simultaneously, characterized in that outer coding (206, 208) is performed for at least some of the signals so that all the signals to be transmitted have a common quality level, and thatsignals thus acquired having the same quality level are combined into frames of a given length, and thatinner coding (220) is performed for the combined signal, and thatsome symbols are repeated or deleted in the frames to be transmitted, if necessary, so that the length of the symbols of each frame is a multifold of a time interval that is known and essentially shorter than the symbol length, and thatthe transmitting power used for transmitting each frame depends on the number of bits each frame had prior to symbol repetition.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention relates to a data transmission method in a wireless data transmission system where signals with one or more data rates and quality levels are transmitted simultaneously. In order for it to be possible to transmit information on the radio path at different rates and quality requirements, the transmitter according to the invention comprises forward error correction coders (206, 208) for carrying out outer coding for at least some of the signals to be transmitted so that all the signals to be transmitted have a common quality level, a multiplexer (214) for combining the signals to be transmitted into frames having a given length, a forward error correction coder (220) for carrying out inner coding for the frames to be transmitted, and a mechanism (222) for repeating or deleting symbols in each frame, if necessary, so that the length of the symbols or each frame equals that of a multifold of a time interval that is known and essentially shorter than the symbol length. The transmitter according to the invention further comprises control logic (254) for adjusting the transmitting power used during transmission of each frame proportionally to the number of symbols each frame had prior to symbol repetition.
-
Citations
19 Claims
-
1. A data transmission method in a wireless data transmission system where signals (200, 202, 204) with one or more data rates and quality levels are transmitted simultaneously, characterized in that outer coding (206, 208) is performed for at least some of the signals so that all the signals to be transmitted have a common quality level, and that
signals thus acquired having the same quality level are combined into frames of a given length, and that inner coding (220) is performed for the combined signal, and that some symbols are repeated or deleted in the frames to be transmitted, if necessary, so that the length of the symbols of each frame is a multifold of a time interval that is known and essentially shorter than the symbol length, and that the transmitting power used for transmitting each frame depends on the number of bits each frame had prior to symbol repetition.
-
13. A transmitter intended to be used in a wireless data transmission system where signals with one or more data rates and quality levels are transmitted simultaneously, characterized in that the transmitter comprises
means (206, 208) for carrying out outer coding for at least some of the signals to be transmitted so that all the signals to be transmitted have a common quality level, means (214) for combining the signals to be transmitted into frames having a given length, means (220) for carrying out inner coding for the frames to be transmitted, means (222) for repeating or deleting symbols in each frame, if necessary, so that the length of the symbols of each frame equals that of a multifold of a time interval that is known and essentially shorter than the symbol length, as well as means (254) for adjusting the transmitting power used during transmission of each frame proportionally to the number of symbols each frame had prior to symbol repetition.
Specification