5 結果
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 番号 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 番号 1GP118
最近のセキュリティに対する意識の高まりから、ウルトラワイドバンド(UWB)テクノロジーを採用した自動車用リモコンが注目を集めています。ローデ・シュワルツでは、研究開発環境や高スループットの製造環境からの高い需要に応えるために、柔軟なテストソリューションを提供しています。
3月 21, 2017
5Gネットワークを実現する際には、容量の増加および柔軟性の向上と共に、システムの運用コスト(OPEX)の削減も求められます。容量の増加とエネルギー効率の向上に同時に対応できる2つの新しいテクノロジーが、仮想化と大規模MIMOです。このホワイトペーパーでは、現在だけでなく将来のアンテナ検証要件にも対応できる、テストソリューションの概要を示します。これには、大規模MIMOアンテナテクノロジーの適用により実現された、有線接続(伝導)テスト手法と無線接続(OTA)テスト方法が含まれます。このホワイトペーパーは、 (1MA276ホワイトペーパー)を補完するものです。ビームフォーミングアンテナの基礎理論を説明し、放射パターン計算手法、多数のシミュレーション結果、および小型リニアアレイの実環境での測定結果を紹介します。
11月 11, 2016 | AN 番号 1MA286