Testing the Double Low-IF Receiver Architecture

Abstract

The purpose of this paper is to show through laboratory results, the performance of the new DLIF (Double Low-IF) receiver architecture. This new approach minimizes the receiver's cost by eliminating the need for RF image-reject and IF-Saw channel filters, avoids some of the shortcomings of direct conversion and single Low-IF methods and can be applied in GSM-like mobile stations. Performance results are presented in terms of Frame Error Rates and Residual Bit Error Rates and can thus be compared with GSM specifications. I INTRODUCTION In this paper detailed test results are provided for an implementation of the Double Low-IF receiver architecture [1] in GSMlike systems. On one hand the tests include classical tests like noise figures, compression points, power consumption etc. On the other hand, we embedded the DLIF chip into a loop-back test configuration using Lucent Sceptre-I baseband components to obtain performance results in terms of frame error rates (FER) and residual bit er..