mirror of https://github.com/PentHertz/srsLTE.git
Added PUCCH/SRS power control
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@ -52,7 +52,7 @@ typedef enum SRSLTE_API {
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SRSLTE_PUCCH_FORMAT_1B,
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SRSLTE_PUCCH_FORMAT_2,
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SRSLTE_PUCCH_FORMAT_2A,
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SRSLTE_PUCCH_FORMAT_2B,
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SRSLTE_PUCCH_FORMAT_2B
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} srslte_pucch_format_t;
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typedef struct SRSLTE_API {
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@ -296,14 +296,14 @@ int srslte_ue_ul_pucch_encode(srslte_ue_ul_t *q, srslte_uci_data_t uci_data,
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ret = SRSLTE_ERROR;
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bzero(q->sf_symbols, sizeof(cf_t)*SRSLTE_SF_LEN_RE(q->cell.nof_prb, q->cell.cp));
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srslte_pucch_format_t format;
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uint8_t pucch_bits[SRSLTE_PUCCH_MAX_BITS];
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uint8_t pucch2_bits[2];
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bzero(pucch_bits, SRSLTE_PUCCH_MAX_BITS*sizeof(uint8_t));
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bzero(pucch2_bits, 2*sizeof(uint8_t));
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// Encode UCI information
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if (pucch_encode_bits(&uci_data, &format, pucch_bits, pucch2_bits, q->cell.cp)) {
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if (pucch_encode_bits(&uci_data, &q->last_pucch_format, pucch_bits, pucch2_bits, q->cell.cp)) {
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return SRSLTE_ERROR;
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}
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@ -311,7 +311,7 @@ int srslte_ue_ul_pucch_encode(srslte_ue_ul_t *q, srslte_uci_data_t uci_data,
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uint32_t n_pucch = 0;
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if (uci_data.scheduling_request) {
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n_pucch = q->pucch_sched.n_pucch_sr;
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} else if (format < SRSLTE_PUCCH_FORMAT_2) {
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} else if (q->last_pucch_format < SRSLTE_PUCCH_FORMAT_2) {
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if (q->pucch_sched.sps_enabled) {
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n_pucch = q->pucch_sched.n_pucch_1[q->pucch_sched.tpc_for_pucch%4];
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} else {
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@ -320,22 +320,26 @@ int srslte_ue_ul_pucch_encode(srslte_ue_ul_t *q, srslte_uci_data_t uci_data,
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} else {
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n_pucch = q->pucch_sched.n_pucch_2;
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}
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if (srslte_pucch_encode(&q->pucch, format, n_pucch, sf_idx, pucch_bits, q->sf_symbols)) {
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if (srslte_pucch_encode(&q->pucch, q->last_pucch_format, n_pucch, sf_idx, pucch_bits, q->sf_symbols)) {
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fprintf(stderr, "Error encoding TB\n");
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return ret;
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}
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if (srslte_refsignal_dmrs_pucch_gen(&q->signals, format, n_pucch, sf_idx, pucch2_bits, q->refsignal))
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if (srslte_refsignal_dmrs_pucch_gen(&q->signals, q->last_pucch_format, n_pucch, sf_idx, pucch2_bits, q->refsignal))
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{
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fprintf(stderr, "Error generating PUSCH DRMS signals\n");
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return ret;
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}
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srslte_refsignal_dmrs_pucch_put(&q->signals, format, n_pucch, q->refsignal, q->sf_symbols);
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srslte_refsignal_dmrs_pucch_put(&q->signals, q->last_pucch_format, n_pucch, q->refsignal, q->sf_symbols);
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if (srslte_ue_ul_srs_tx_enabled(&q->signals.srs_cfg, tti) && q->pucch.shortened) {
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if (q->signals_pregenerated) {
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srslte_refsignal_srs_pregen_put(&q->signals, &q->pregen_srs, tti, q->sf_symbols);
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} else {
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srslte_refsignal_srs_gen(&q->signals, tti%10, q->srs_signal);
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srslte_refsignal_srs_put(&q->signals, tti, q->srs_signal, q->sf_symbols);
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}
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}
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srslte_ofdm_tx_sf(&q->fft, q->sf_symbols, output_signal);
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@ -491,10 +495,7 @@ int srslte_ue_ul_pusch_encode_rnti_softbuffer(srslte_ue_ul_t *q,
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return ret;
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}
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/* Returns the transmission power for PUSCH for this subframe */
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/* Returns the transmission power for PUSCH for this subframe as defined in Section 5.1.1 of 36.213 */
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float srslte_ue_ul_pusch_power(srslte_ue_ul_t *q, float PL, float p0_preamble)
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{
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float p0_pusch, alpha;
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@ -516,15 +517,78 @@ float srslte_ue_ul_pusch_power(srslte_ue_ul_t *q, float PL, float p0_preamble)
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MPR /= q->pusch_cfg.nbits.nof_re;
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delta = 10*log10((pow(2,MPR*1.25)-1)*beta_offset_pusch);
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}
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// This implements closed-loop power control
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//TODO: This implements closed-loop power control
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float f=0;
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float pusch_power = 10*log10(q->pusch_cfg.grant.L_prb)+p0_pusch+alpha*PL+delta+f;
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DEBUG("P=%f -- 10M=%f, p0=%f,alpha=%f,PL=%f,delta=%f,f=%f\n", pusch_power, 10*log10(q->pusch_cfg.grant.L_prb), p0_pusch, alpha, PL, delta, f);
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DEBUG("PUSCH: P=%f -- 10M=%f, p0=%f,alpha=%f,PL=%f,\n",
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pusch_power, 10*log10(q->pusch_cfg.grant.L_prb), p0_pusch, alpha, PL);
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return SRSLTE_MIN(SRSLTE_PC_MAX, pusch_power);
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}
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/* Returns the transmission power for PUCCH for this subframe as defined in Section 5.1.2 of 36.213 */
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float srslte_ue_ul_pucch_power(srslte_ue_ul_t *q, float PL, srslte_pucch_format_t format, uint32_t n_cqi, uint32_t n_harq) {
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float p0_pucch = q->power_ctrl.p0_nominal_pucch + q->power_ctrl.p0_ue_pucch;
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uint8_t format_idx = format==0?0:((uint32_t) format-1);
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float delta_f = q->power_ctrl.delta_f_pucch[format_idx];
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float h;
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if(format <= SRSLTE_PUCCH_FORMAT_1B) {
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h = 0;
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} else {
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if (SRSLTE_CP_ISNORM(q->cell.cp)) {
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if (n_cqi >= 4) {
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h = 10*log10(n_cqi/4);
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} else {
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h = 0;
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}
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} else {
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if (n_cqi + n_harq >= 4) {
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h = 10*log10((n_cqi+n_harq)/4);
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} else {
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h = 0;
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}
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}
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}
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//TODO: This implements closed-loop power control
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float g = 0;
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float pucch_power = p0_pucch + PL + h + delta_f + g;
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DEBUG("PUCCH: P=%f -- p0=%f, PL=%f, delta_f=%f, h=%f, g=%f\n",
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pucch_power, p0_pucch, PL, delta_f, h, g);
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return pucch_power;
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}
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/* Returns the transmission power for SRS for this subframe as defined in Section 5.1.3 of 36.213 */
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float srslte_ue_ul_srs_power(srslte_ue_ul_t *q, float PL) {
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float alpha = q->power_ctrl.alpha;
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float p0_pusch = q->power_ctrl.p0_nominal_pusch + q->power_ctrl.p0_ue_pusch;
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//TODO: This implements closed-loop power control
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float f=0;
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uint32_t M_sc = srslte_refsignal_srs_M_sc(&q->signals);
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float p_srs_offset;
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if (q->power_ctrl.delta_mcs_based) {
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p_srs_offset = -3 + q->power_ctrl.p_srs_offset;
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} else {
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p_srs_offset = -10.5 + 1.5*q->power_ctrl.p_srs_offset;
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}
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float p_srs = p_srs_offset + 10*log10(M_sc) + p0_pusch + alpha*PL + f;
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DEBUG("SRS: P=%f -- p_offset=%f, 10M=%f, p0_pusch=%f, alpha=%f, PL=%f, f=%f\n",
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p_srs, p_srs_offset, 10*log10(M_sc), p0_pusch, alpha, PL, f);
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return p_srs;
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}
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/* Returns 1 if a SR needs to be sent at current_tti given I_sr, as defined in Section 10.1 of 36.213 */
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int srslte_ue_ul_sr_send_tti(uint32_t I_sr, uint32_t current_tti) {
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