Tag Archives: QPSK

Quadrature Phase Shift Keying (QPSK) is a form of Phase Shift Keying in which two bits are modulated at once, selecting one of four possible carrier phase shifts (0, 90, 180, or 270 degrees). QPSK allows the signal to carry twice as much information as ordinary PSK using the same bandwidth.

Common BLE issues

Here we introduce a few main issues with BLE based on our experience working with hardware companies to develop software and firmware.