5 결과
LTE user equipment (UE) receiver performance has significant impact to cellular radio network coverage and capacity. It determines the maximum data throughput across the air interface between the LTE base station (eNB, evolved node B) and the mobile network subscriber UE, thus it determines the total capacity across the air interface. Therefore, it is one of the most important measurements to verify the actual receiver performance of individual devices, and a key metric to compare different devices, in particular.This paper shall give an introduction to receiver performance measurements and discusses the measurement metrics as well as the challenges of over the air (OTA) measurements.
Aug 31, 2017 | AN-번호 1ST001
Radio frequencies in bands around 28 GHz are being discussed as candidates for mobile communications of the fifth generation (5G). Beam steering will be a key feature in the context of 5G. It will be a major challenge to test the beam steering capabilities of base stations and user equipment in every phase from research and development through production. Conducted measurements will be mainly replaced by over-the-air measurements of electromagnetic radiation. Rohde & Schwarz offers the R&S®NRPM Over-the-Air (OTA) Power Measurement Solution that perfectly fits such measurement needs.Part of this solution are the R&S®NRPM-A66 antenna modules. They have integrated diode detectors. Thus, there are no cables between the antenna and the detector as in traditional setups. This avoids high and potentially unknown RF losses. The R&S®NRPM-A66 antenna modules with their integrated diode detectors are factory calibrated, which means that the user does not have to calibrate them to achieve highly accurate measurement results.This application note contains theoretical background on OTA power and pattern measurements. It gives step-by-step instructions for the verification of the power level and the radiation pattern of a device under test (DUT) in comparison to a golden device, and it presents an approach for verifying the accuracy of beam steering.
Aug 29, 2017 | AN-번호 1GP118
최근 보안 문제로 인해 자동차 키에 UWB(Ultrawideband) 기술이 적용되고 있습니다. 로데슈바르즈는 R&D 및 대량 생산 환경의 까다로운 요구사항에 대응하는 유연한 테스트 솔루션을 제공하고 있습니다.
3월 21, 2017
5G 네트워크는 시스템 운영 비용을 절감하는 동시에 더 많은 용량과 유연성을 제공해야 합니다. 두 가지 새로운 기술, 즉, 가상화와 Massive MIMO가 용량 증가와 에너지 효율성 증가 문제를 동시에 해결할 수 있습니다. 이 백서는 Conducted 및 OTA(Over-the-Air) 테스트 방법을 포함한 현재와 미래의 안테나 검증 방식에서 Massive MIMO 안테나 기술을 적용함으로써 요구되는 사항을 해결하는 테스트 솔루션에 대해 소개합니다.본 백서는 빔포밍 안테나에 관한 기초 이론을 소개하고 방사 패턴, 수많은 시뮬레이션 결과와 소규모 선형 배열에 대한 몇 가지 실제 측정 결과에 대한 계산 방법을 제공하는 로데슈바르즈 백서(1MA276) 을 보완합니다.
11월 11, 2016 | AN-번호 1MA286