Wireless communication system, wireless transmitter, wireless receiver, wireless communication method, wireless transmission method and wireless reception method
A radio receiver, radio technology, applied in multiplexing communications, code division multiplexing systems, electrical components, etc., can solve the rising cost and power consumption of radio communication systems, design difficulties, scale and hardware size increase, etc.
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no. 1 example
[0087] The radio communication system according to the first embodiment does not use a carrier, but encodes a digital signal to be transmitted by a code that does not contain any DC component, and transmits the encoded signal on the transmitting side, and two pairs of received signals are decoded corresponding to the encoding , and a method of recovering a digital signal on the receiving side, transmits / receives a digital signal. A first embodiment will be described below with reference to the drawings.
[0088] figure 1 is a block diagram showing the configuration of the radio communication system of the first embodiment. exist figure 1 , the radio communication system consists of a radio transmitter 1 and a radio receiver 2. The radio transmitter 1 includes an encoder 11 , a power amplifier 12 and a transmitting antenna 13 . The radio receiver 2 includes a receiving antenna 21 , an LNA 22 and a decoder 23 .
[0089] The operation of the radio communication system will...
no. 2 example
[0103] The radio communication system according to the second embodiment is almost the same as the radio communication system according to the first embodiment. The radio communication system according to the second embodiment is characterized in that a digital signal to be transmitted is multiplied by a spreading code on the transmitting side to perform spread spectrum processing, and a received signal is despreading processed on the receiving side. A second embodiment will be described below with reference to the drawings, and descriptions of parts common to the first embodiment will be omitted.
[0104] Figure 4 is a block diagram of the configuration of the radio communication system according to the second embodiment. exist Figure 4 Among them, the radio communication system consists of a radio transmitter and a radio receiver 4. The radio transmitter 3 includes a spreading code generator 31 , a multiplier 32 , a power amplifier 33 and a transmitting antenna 34 . Th...
no. 3 example
[0119] The radio communication system according to the third embodiment is almost the same as the radio communication system according to the second embodiment, and the radio communication system according to the third embodiment is characterized in that spreading processing is performed using a spreading code not containing any DC component. The third embodiment will be explained below, and the description of the parts common to the second embodiment will be omitted.
[0120] In the third embodiment, a spreading code generator 31 generates a spreading code without any DC component, and supplies the spreading code to a multiplier 32 . For example, the spreading code generator 31 first generates a spreading code of a unipolar NRZ signal, encodes the spreading code using a code that does not contain any DC component, and supplies the encoded spreading code to the multiplier 32 . However, the present invention is not limited to these processes as long as spreading codes are gener...
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