Sökning: "communication channels"

Visar resultat 1 - 5 av 330 avhandlingar innehållade orden communication channels.

1. 1. Data Transmission in the Presence of Limited Channel State Information Feedback

   Författare :Behrooz Makki; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Channel state information; Outage probability; Long-term throughput; Continuous communication; Feedback compression; Hybrid automatic repeat request HARQ ; Green communication; Bursty communication; Adaptive power allocation; CSI quantization; Block-fading channels; Correlated fading channels;

   Sammanfattning : .... LÄS MER

3. 2. Massive MIMO for Dependable Communication

   Författare :Sara Willhammar; Kommunikationsteknologi; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Channel characterisation; Channel measurements; Channel modeling; Industrial automation; Industry 4.0; Internet-of-Things; Massive MIMO; mMTC; Reliability; URLLC;

   Sammanfattning : Cellular communication is constantly evolving; currently 5G systems are being deployed and research towards 6G is ongoing. Three use cases have been discussed as enhanced mobile broadband (eMBB), massive machine-type communication (mMTC), and ultra-reliable low-latency communication (URLLC). LÄS MER

4. 3. On the Design of Noncoherent Acoustic Underwater Communication

   Författare :Viktor Lidström; Magnus Lundberg Nordenvaad; Peter Sigray; Jacob Kuttenkeuler; Paul van Walree; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; noncoherent; acoustic underwater communication; link adaptation; adaptive networks; ickecoherent; akustisk undervattenskommunikation; länkadaption; adaptiva nätverk; Farkostteknik; Vehicle and Maritime Engineering;

   Sammanfattning : The underwater domain is an environment hostile to humans due to the hydrostatic pressure that rapidly increases with water depth, which has led to underwater robotics becoming an emerging technological field with many commercial-, environmental-, and security-related applications. A major challenge to untethered autonomous underwater vehicles (AUVs) is communicating robot-to-robot and robot-to-topside operator since it must, in most cases, be done acoustically. LÄS MER

5. 4. Constellation Shaping in Optical Communication Systems

   Författare :Ali Mirani; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; coherent receiver; constellation shaping; multidimensional modulation format; optical communications; probabilistic shaping; geometric shaping;

   Sammanfattning : Exploiting the full-dimensional capacity of coherent optical communication systems is needed to overcome the increasing bandwidth demands of the future Internet. To achieve capacity, both coding and shaping gains are required, and they are, in principle, independent. LÄS MER

7. 5. Aspects of Power Consumption in Coherent Fiber-Optical Communication Systems

   Författare :Lars Lundberg; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; optical frequency comb; Fiber-optical communication; power consumption; carrier-recovery; Raman amplification; energy-efficiency; optical amplifier; digital signal processing; coherent detection; erbium-doped fiber amplifier; phase-tracking;

   Sammanfattning : The power consumption of coherent fiber-optical communication systems is becoming increasingly important, for both environmental and economical reasons. The data traffic on the Internet is increasing at a faster pace than that at which optical network equipment is becoming more energy efficient, which means that the overall power consumption of the Internet is increasing. LÄS MER