phy_simulators编译好了，跑了下ctest，发现跟dlsim.c相关的几个test报错了，调试了一下，顺便理解dlsim.c。报错原因可能就是比特错误了，但调大了snr也不行，可能是链路本身错误，后面再说吧。。。

1. 传统的物理层算法的多层循环

ch_realization, 0->n_ch_rlz-1

    snr, snr_0->snr_1

        trials, 0->n_frames-1

            round, 0->num_rounds-1, HARQ rounds

2. 参数配置

先初始化并取默认值：static paramdef_t options[] = { … { "nb_frame", "number of frame in a test",0, .iptr=&n_frames, .defintval=1, TYPE_INT, 0 }, … };

具体是通过 struct option *long_options = parse_oai_options(options); 把.defintval=1赋值给n_frames了，很特殊的赋值方式，可能适合批量参数的整体赋值吧

还可以通过命令行的输入来修改，是一个while循环：

while ((res=getopt_long_only(argc, argv, "-", long_options, &option_index)) >= 0) { }

还有个函数修改： uniqCfg = load_configmodule(argc, argv, CONFIG_ENABLECMDLINEONLY);

3. ctest里的默认dlsim.c相关的第一个测试的参数是：-m=5 -g=F -s=-1 -w=1.0 -f=.2 -n=1500 -B=50 -c=2 -z=2 -Tperf=60

-m

-g: {‘F’,EVA,6}

-s: snr0

-w: snr_int

-f: snr_step

-n: n_frames

-B

-c

-z

-Tperf: test_perf

4. 好像errs[0]和effective_rate都会导致test_passed=0

5. 原作者的快速错误打印是下面这一句，但目前我还看不大懂，后续再看看吧：

printf("Errors (%u(%u)/%u %u/%u %u/%u %u/%u), Pe = (%e,%e,%e,%e), dci_errors %u/%u, Pe = %e => effective rate %f, normalized delay %f (%f)\n",

errs[0],

errs2[0],

round_trials[0],

errs[1],

round_trials[1],

errs[2],

round_trials[2],

errs[3],

round_trials[3],

(double)errs[0]/(round_trials[0]),

(double)errs[1]/(round_trials[1]),

(double)errs[2]/(round_trials[2]),

(double)errs[3]/(round_trials[3]),

dci_errors[0]+dci_errors[1]+dci_errors[2]+dci_errors[3],

round_trials[0]+round_trials[1]+round_trials[2]+round_trials[3],

(double)(dci_errors[0]+dci_errors[1]+dci_errors[2]+dci_errors[3])/(round_trials[0]+round_trials[1]+round_trials[2]+round_trials[3]),

//rate*effective_rate, 100*effective_rate,

//rate,

//rate*get_Qm(UE->dlsch[UE->current_thread_id[subframe]][0][0]->harq_processes[UE->dlsch[UE->current_thread_id[subframe]][0][0]->current_harq_pid]->mcs),

(1.0*(round_trials[0]-errs[0])+2.0*(round_trials[1]-errs[1])+3.0*(round_trials[2]-errs[2])+4.0*(round_trials[3]-errs[3]))/((double)round_trials[0])/ (double)eNB->dlsch[0][0]->harq_processes[0]->TBS,

(1.0*(round_trials[0]-errs[0])+2.0*(round_trials[1]-errs[1])+3.0*(round_trials[2]-errs[2])+4.0*(round_trials[3]-errs[3]))/((double)round_trials[0]));