PHS mobile phone and emission power control method thereof

Abstract

The invention discloses a PHS mobile phone which comprises an antenna, a front end filter, an antenna switch, a radio frequency power amplifier, a radio frequency transceiver chip, a baseband chip, a memory and a peripheral device. The antenna, the front end filter, the antenna switch, the radio frequency power amplifier, the radio frequency transceiver chip and the baseband chip are connected in turn, and the baseband chip is further connected with the memory and the peripheral device respectively. The invention further discloses a transmission power control method of the PHS mobile phone. The PHS mobile phone can adjust the transmission power of the PHS mobile phone at all times according to the strength range of received signals. The transmission power of the PHS mobile phone is increased in the weak signal area, and the transmission power of the PHS mobile phone is reduced in the stronger signal area.

Description

technical field [0001] The present invention relates to the power control technology of PHS (Personal Handyphone System, personal handheld telephone system) system, especially a PHS mobile phone and its transmission power control method, the PHS mobile phone can automatically adjust the transmission power according to the received signal strength. Background technique [0002] The PHS system adopts micro-cellular communication technology. In the early stage of development, most of them used low-power base stations with a transmission power of 10mW and 20mW. Due to the small coverage of base stations, PHS mobile phones are prone to frequent switching between different base stations, and it is more likely to occur when switching between different areas. The switching time is long and the call drop phenomenon seriously affects the call quality. In order to overcome the above defects, high-power base stations with a transmission power of 200mW and 500mW were adopted later, which...

AI Technical Summary

Problems solved by technology

However, the performance of the uplink has not been greatly improved. The transmission power of the PHS mobile phone is still only 10mw. Although the receiving sensitivity of the base station has also been improved, compared with the downlink, the performance of the uplink is still slightly insufficient.

Therefore, at the edge of some cells, problems such as one-way communication, intermittent calls, dropped calls, and poor call quality often occur due to insufficient uplinks, and even the embarrassing situation that there is a signal but the call cannot be made.

[0003] On the other hand, since the transmitting power of the current PHS mobile phone is generally 10mW, it is fixed during the whole call.

When the PHS mobile phone is very close to the base station and the signal is strong, the transmission power of 10mW is obviously too high, which not only easily causes interference to other users, but also increases the unnecessary power consumption of the PHS mobile phone, wasting battery power in vain

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