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3GPP Release 7 introduced several new powerful features to the existing HSDPA (High Speed Downlink Packet Access) functionality including higher order modulation (SIMO 64 QAM - Single Input Multiple Output, 64 Quadrature Amplitude Modulation) and MIMO 16QAM (Multiple Input Multiple Output). These additional features - commonly referred to as “HSPA+” - aim at improving user experience by increasing...
In this paper, we report on the results of physical-layer multiple-input-multiple-output High-Speed Downlink Packet Access (HSDPA) throughput measurements. These measurements were carried out in two different environments: 1) an alpine valley and 2) a city. In addition to the standard compliant single- and two-transmit-antenna HSDPA schemes, we defined and measured a four-transmit-antenna HSDPA scheme...
This paper presents a quantitative performance analysis of the dual-cell high-speed downlink packet access (DC-HSDPA) operation focused on the gain achieved by pooling the radio resources of two carriers in the same base station and enabling a collaborative operation (joint-scheduling) on the lower radio layers.
Mobile WiMAX as an OFDMA (Orthogonal Frequency Division Multiple Access) mobile broadband air interface is a solution to the requirements for mobile internet services. It has been accepted by ITU as 3G standard last year. The work presented in this paper focuses on evaluation of the Mobile WiMAX system performance in which Full-Queue and VoIP traffic are considered both in downlink and uplink We have...
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