Beyond 3G - Bringing Networks, Terminals and the Web by Martin Sauter PDF

By Martin Sauter

ISBN-10: 0470751886

ISBN-13: 9780470751886

I purchased this publication someday in the past simply because i presumed that the author's earlier booklet used to be good written, even if I by no means discovered time to learn it completely.

Over previous few months, i found that I saved going again to the booklet and the author's weblog to appear for reference (e.g. to get a greater realizing on SIM card, or to calculate spectrum potency and mobilephone capability, etc.). So i made a decision to deliver this booklet with me on a visit and eventually learn the full ebook (well... almost). i must say this can be one other rather well written ebook from the writer. The writing is especially transparent and the figures appear at the place they're wanted, not anything fancy, dry, or redundant. barely enough textual content and figures to hide the subject and that i by no means needed to re-read a piece to appreciate the topic (like I often do whilst interpreting a 3GPP standard).

What I cherished the main approximately this booklet is that the chosen components that the writer selected to dive into mirrored not just his thorough figuring out of the traditional, but additionally his noticeable hands-on event. This e-book was once not just good understandable, but in addition useful, an outstanding connection with have at your table for a instant engineer. i glance ahead to learn destiny courses from the writer, both at his web publication or a brand new publication.

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Additional resources for Beyond 3G - Bringing Networks, Terminals and the Web Together: LTE, WiMAX, IMS, 4G Devices and the Mobile Web 2.0

Sample text

Advanced algorithms in the base station use the knowledge about reception conditions of all mobile devices currently served on the high-speed shared channel. Devices with better signal conditions can be preferred by the scheduler, while devices that are in temporary deep fading situations receive fewer packets. This helps to reduce transmission errors and improves overall throughput of the cell as, on average, frames are transmitted with more efficient modulation and coding schemes. Studies in [10] and [11] have shown that an efficient scheduler can increase overall cell capacity by up to 30% compared with a simple scheduler that assigns timeslots in a round robin fashion.

Beyond 3G Network Architectures DCH** HS-DSCH RNC NodeB 37 E-AGCH E-HICH* E-RGCH* HS -SCCH HS-PDSCH DPDCH DPCCH ... g. 8 Channels for a combined HSDPA and HSUPA transmission in the downlink direction. g. 9 Channels for a combined HSDPA and HSUPA transmission in the uplink direction. 1 Higher Order Modulation One of the key parameters of a wireless system that is often cited in articles is the maximum transmission speed. 4 Mbit/s in the downlink direction, which translates to 2–5 Mbit/s in practice under good radio conditions.

3 Higher Order Modulation To further increase transmission speeds, HSDPA introduces a higher order modulation scheme to improve throughput for devices that receive the transmissions of the base station with a good signal quality. Basic UMTS uses Quadrature Phase Shift Keying (QPSK) modulation, which encodes two basic information elements (chips) per transmission step. HSDPA introduces 16QAM (Quadrature Amplitude Modulation) modulation, which encodes four chips per transmission step. This doubles the achievable bandwidth under good reception conditions.

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Beyond 3G - Bringing Networks, Terminals and the Web Together: LTE, WiMAX, IMS, 4G Devices and the Mobile Web 2.0 by Martin Sauter


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