Transmitter and receiver
First Claim
1. A transmitter that transmits a signal to a receiver, comprising:
- a first transmitting means that transmits the signal using a frame format that is formed by a first pilot signal in which an end portion of a known signal that has been matched in advance with the receiver is reproduced at a front of the first known signal, and by first transmitted binary data in which an end portion of the data is reproduced at a front of the data;
a second transmitting means that transmits the signal using a frame format formed by a second pilot signal formed by a second known signal that has been matched in advance with the receiver, and by second transmitted binary data;
a selection means that selects one of the first transmitting means and the second transmitting means when the signal is transmitted;
a quality information sharing means that shares quality information that relates to the quality of the transmitted signal with the receiver; and
a multiplex number deciding means that decides from the quality information shared with the receiver whether or not code division multiplexing is present for the transmitted signal and also decides a number of Walsh multiplex,wherein the selection means selects one of the first transmitting means and the second transmitting means using control information created in accordance with the decision as to whether or not code division multiplexing is present for the transmitted signal and also the number of Walsh multiplex.
1 Assignment
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Accused Products
Abstract
A receiver informs a delay profile and CIR measured in an FDE or a Rake receiver, together with a bit error rate of a received signal that is required in a receiver, as quality information to a transmitter. In the transmitter, based on the delay profile and CIR contained in the notified quality information, a number of code division multiplex and a frame format are decided in a decision circuit such that a bit error rate of a received signal, which is necessary on the receiver side, can be obtained. In addition, a transmission selection switch selects one of a unique word insertion unit and a cyclic prefix insertion unit that create a frame format for FDE reception and a pilot insertion unit and a complex scrambling unit that create a frame format for Rake reception, and data is then transmitted.
34 Citations
9 Claims
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1. A transmitter that transmits a signal to a receiver, comprising:
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a first transmitting means that transmits the signal using a frame format that is formed by a first pilot signal in which an end portion of a known signal that has been matched in advance with the receiver is reproduced at a front of the first known signal, and by first transmitted binary data in which an end portion of the data is reproduced at a front of the data; a second transmitting means that transmits the signal using a frame format formed by a second pilot signal formed by a second known signal that has been matched in advance with the receiver, and by second transmitted binary data; a selection means that selects one of the first transmitting means and the second transmitting means when the signal is transmitted; a quality information sharing means that shares quality information that relates to the quality of the transmitted signal with the receiver; and a multiplex number deciding means that decides from the quality information shared with the receiver whether or not code division multiplexing is present for the transmitted signal and also decides a number of Walsh multiplex, wherein the selection means selects one of the first transmitting means and the second transmitting means using control information created in accordance with the decision as to whether or not code division multiplexing is present for the transmitted signal and also the number of Walsh multiplex. - View Dependent Claims (2, 3, 4, 5)
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6. A receiver that receives a signal from a transmitter, comprising:
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a first receiving means that receives the signal by operating a frequency domain equalizer (FDE); a second receiving means that performs Rake reception of the signal; a selection means that selects one of the first receiving means and the second receiving means; a quality measuring means that measures the quality of a received signal; a multiplex number deciding means that decides whether or not code division multiplexing is present for a transmitted signal and also decides a number of Walsh multiplex from quality information relating to the quality of the signal; and a format information sharing means that shares information relating to the frame format with the transmitter, wherein the selection means selects one of the first receiving means and the second receiving means using control information created in accordance with the decision as to whether or not code division multiplexing is present for the transmitted signal and also the number of Walsh multiplex, and wherein the format information sharing means shares with the transmitter information concerning the frame format that relates to the one of the first transmission means and the second transmission means that is selected. - View Dependent Claims (7, 8, 9)
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Specification