5 結果
無線規格Bluetooth®は、市場の圧倒的な支持を得ています。スマートフォン、PC、自動車、エンターテイメントハードウェア、ウェアラブルのほぼすべてに搭載されています。Bluetooth SIGによれば、現在使用されているデバイスは80億台を超えています。Bluetoothはモノのインターネット(IoT)テクノロジーと方向探知手法をサポートし、将来への備えも万全です。このホワイトペーパーでは、コア仕様バージョン5.1の物理層を中心に、Bluetoothの各種テクノロジーの概要を紹介します。
6月 05, 2019 | AN 番号 1MA108
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
High Speed Downlink Packet Access (HSDPA) and High Speed Uplink Packet Access (HSUPA) optimize UMTS for packet data services in the downlink and uplink, respectively. Together, they are referred to as High Speed Packet Access (HSPA). Within 3GPP Release 7, 8, 9 and 10, further improvements to HSPA have been specified in the context of HSPA+ or HSPA evolution. This Application Note describes how HSPA+ features can be tested using Rohde & Schwarz instruments.
Apr 26, 2013 | AN 番号 1MA121
This white paper summarizes the technology options for supporting voice and short message service (SMS) in LTE, including circuit switched fallback (CSFB), SMS over SGs, and voice over LTE (VoLTE).
May 11, 2011 | AN 番号 1MA197
This application note explains the fundamentals of the cell search and cell selection and reselection procedures required for both modes of UMTS Long Term Evolution: FDD and TDD. It describes how to generate and analyze the required signals using Rohde & Schwarz test and measurement solutions. The application note also shows how to perform interoperability tests and terminal conformance tests according to the baseline of the 3GPP specifications for protocol conformance and Radio Resource Management (RRM).
Sep 17, 2009 | AN 番号 1MA150