PM7820 Paladin 20
Digital Multicarrier Device

The PALADIN family of digital multicarrier chip technologies enables the development of spectrally efficient and power efficient 3G and WiMAX base stations that use fewer and less expensive components than traditional feedforward designs. The PALADIN products, which include the PM7800 PALADIN 10, PM7815 PALADIN 15, PM7820 PALADIN 20, and the PM7819 PALADIN WAVESHAPER, make extensive use of proprietary advanced high-speed DSP-based architectures and techniques.

The PM7820 PALADIN 20 device inhibits distortion in the power amplifier and transmitter chain of cellular base stations using digital adaptive predistortion techniques. The PALADIN 20 device supports the new Doherty power amplifier (PA) architectures in BTS designs, which achieve power efficiencies of more than 40 per cent, doubling the efficiency of currently deployed Class A/B LDMOS PAs. The device also enables integration into space-constrained next generation Remote Radio Head (RRH) architectures, through its 23 mm x 23 mm footprint. As well, the device provides 20 MHz of bandwidth for WCDMA, CDMA2000, and WiMAX applications.

The PALADIN 20 system comprises a Digital Correction Signal Processor (DCSP) chip and an Adaptive Control Processor Compensation Engine (ACPCE). The DCSP applies corrective parameters to each sample in real time, while the ACPCE automatically adapts the corrective parameters to maintain optimum performance as the distortions change over time.