Wireless communication device and wireless communication method
摘要
說明書
First, calculation of the distance d1 will be described. The control unit 230 calculates the distance d1 on the basis of an attenuation amount of radio waves related to a signal transmitted from STA 200-1 #1 to AP 100-1 #1. Specifically, the control unit 230 calculates the distance d1 on the basis of the transmission power information acquired from the PHY header and estimated reception signal strength in regard to a response signal in the AP 100-1 #1. For example, the distance d1 is calculated from the following Expression (1). [Math. 1] d1=f1(TxPSTA #1?RxPSTA #1>AP #1)??(1)
In the foregoing Expression (1), f1 indicates a function of calculating a distance from an attenuation amount. In addition, TxPSTA #1 indicates transmission power of STA 200-1 #1. RxPSTA #1>AP #1 indicates reception power of AP 100-1 #1 in regard to a signal received from STA 200-1 #1, for example, reception signal strength. Moreover, the function f1 may be improved on the basis of a previous calculation result.
In addition, the control unit 230 estimates reception signal strength in regard to the response signal in AP 100-1 #1, the reception signal strength being substituted to the foregoing Expression (1). Specifically, the reception signal strength is estimated on the basis of a signal to interference ratio (SIR) and the allowance signal information. For example, the reception signal strength is calculated from the following Expression (2). [Math. 2] RxPAP #1=f2(SIRAP #1,IAP #1)??(2)
